Mercurial > octave-nkf
annotate libcruft/arpack/src/cnaup2.f @ 12274:9f5d2ef078e8 release-3-4-x
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 28 Jan 2011 14:04:33 -0500 |
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import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
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1 c\BeginDoc |
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2 c |
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3 c\Name: cnaup2 |
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4 c |
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5 c\Description: |
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6 c Intermediate level interface called by cnaupd. |
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7 c |
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8 c\Usage: |
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9 c call cnaup2 |
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10 c ( IDO, BMAT, N, WHICH, NEV, NP, TOL, RESID, MODE, IUPD, |
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11 c ISHIFT, MXITER, V, LDV, H, LDH, RITZ, BOUNDS, |
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12 c Q, LDQ, WORKL, IPNTR, WORKD, RWORK, INFO ) |
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13 c |
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14 c\Arguments |
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15 c |
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16 c IDO, BMAT, N, WHICH, NEV, TOL, RESID: same as defined in cnaupd. |
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17 c MODE, ISHIFT, MXITER: see the definition of IPARAM in cnaupd. |
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18 c |
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19 c NP Integer. (INPUT/OUTPUT) |
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20 c Contains the number of implicit shifts to apply during |
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21 c each Arnoldi iteration. |
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22 c If ISHIFT=1, NP is adjusted dynamically at each iteration |
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23 c to accelerate convergence and prevent stagnation. |
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24 c This is also roughly equal to the number of matrix-vector |
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25 c products (involving the operator OP) per Arnoldi iteration. |
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26 c The logic for adjusting is contained within the current |
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27 c subroutine. |
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28 c If ISHIFT=0, NP is the number of shifts the user needs |
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29 c to provide via reverse comunication. 0 < NP < NCV-NEV. |
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30 c NP may be less than NCV-NEV since a leading block of the current |
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31 c upper Hessenberg matrix has split off and contains "unwanted" |
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32 c Ritz values. |
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33 c Upon termination of the IRA iteration, NP contains the number |
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34 c of "converged" wanted Ritz values. |
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35 c |
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36 c IUPD Integer. (INPUT) |
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37 c IUPD .EQ. 0: use explicit restart instead implicit update. |
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38 c IUPD .NE. 0: use implicit update. |
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39 c |
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40 c V Complex N by (NEV+NP) array. (INPUT/OUTPUT) |
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41 c The Arnoldi basis vectors are returned in the first NEV |
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42 c columns of V. |
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43 c |
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44 c LDV Integer. (INPUT) |
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45 c Leading dimension of V exactly as declared in the calling |
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46 c program. |
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47 c |
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48 c H Complex (NEV+NP) by (NEV+NP) array. (OUTPUT) |
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49 c H is used to store the generated upper Hessenberg matrix |
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50 c |
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51 c LDH Integer. (INPUT) |
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52 c Leading dimension of H exactly as declared in the calling |
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53 c program. |
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54 c |
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55 c RITZ Complex array of length NEV+NP. (OUTPUT) |
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56 c RITZ(1:NEV) contains the computed Ritz values of OP. |
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57 c |
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58 c BOUNDS Complex array of length NEV+NP. (OUTPUT) |
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59 c BOUNDS(1:NEV) contain the error bounds corresponding to |
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60 c the computed Ritz values. |
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61 c |
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62 c Q Complex (NEV+NP) by (NEV+NP) array. (WORKSPACE) |
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63 c Private (replicated) work array used to accumulate the |
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64 c rotation in the shift application step. |
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65 c |
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66 c LDQ Integer. (INPUT) |
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67 c Leading dimension of Q exactly as declared in the calling |
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68 c program. |
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69 c |
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70 c WORKL Complex work array of length at least |
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71 c (NEV+NP)**2 + 3*(NEV+NP). (WORKSPACE) |
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72 c Private (replicated) array on each PE or array allocated on |
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73 c the front end. It is used in shifts calculation, shifts |
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74 c application and convergence checking. |
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75 c |
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76 c |
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77 c IPNTR Integer array of length 3. (OUTPUT) |
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78 c Pointer to mark the starting locations in the WORKD for |
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79 c vectors used by the Arnoldi iteration. |
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80 c ------------------------------------------------------------- |
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81 c IPNTR(1): pointer to the current operand vector X. |
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82 c IPNTR(2): pointer to the current result vector Y. |
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83 c IPNTR(3): pointer to the vector B * X when used in the |
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84 c shift-and-invert mode. X is the current operand. |
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85 c ------------------------------------------------------------- |
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86 c |
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87 c WORKD Complex work array of length 3*N. (WORKSPACE) |
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88 c Distributed array to be used in the basic Arnoldi iteration |
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89 c for reverse communication. The user should not use WORKD |
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90 c as temporary workspace during the iteration !!!!!!!!!! |
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91 c See Data Distribution Note in CNAUPD. |
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92 c |
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93 c RWORK Real work array of length NEV+NP ( WORKSPACE) |
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94 c Private (replicated) array on each PE or array allocated on |
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95 c the front end. |
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96 c |
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97 c INFO Integer. (INPUT/OUTPUT) |
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98 c If INFO .EQ. 0, a randomly initial residual vector is used. |
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99 c If INFO .NE. 0, RESID contains the initial residual vector, |
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100 c possibly from a previous run. |
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101 c Error flag on output. |
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102 c = 0: Normal return. |
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103 c = 1: Maximum number of iterations taken. |
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104 c All possible eigenvalues of OP has been found. |
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105 c NP returns the number of converged Ritz values. |
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106 c = 2: No shifts could be applied. |
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107 c = -8: Error return from LAPACK eigenvalue calculation; |
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108 c This should never happen. |
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109 c = -9: Starting vector is zero. |
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110 c = -9999: Could not build an Arnoldi factorization. |
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111 c Size that was built in returned in NP. |
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112 c |
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113 c\EndDoc |
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114 c |
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115 c----------------------------------------------------------------------- |
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116 c |
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117 c\BeginLib |
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118 c |
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119 c\Local variables: |
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120 c xxxxxx Complex |
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121 c |
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122 c\References: |
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123 c 1. D.C. Sorensen, "Implicit Application of Polynomial Filters in |
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124 c a k-Step Arnoldi Method", SIAM J. Matr. Anal. Apps., 13 (1992), |
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125 c pp 357-385. |
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126 c 2. R.B. Lehoucq, "Analysis and Implementation of an Implicitly |
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127 c Restarted Arnoldi Iteration", Rice University Technical Report |
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128 c TR95-13, Department of Computational and Applied Mathematics. |
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129 c |
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130 c\Routines called: |
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131 c cgetv0 ARPACK initial vector generation routine. |
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132 c cnaitr ARPACK Arnoldi factorization routine. |
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133 c cnapps ARPACK application of implicit shifts routine. |
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134 c cneigh ARPACK compute Ritz values and error bounds routine. |
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135 c cngets ARPACK reorder Ritz values and error bounds routine. |
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136 c csortc ARPACK sorting routine. |
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137 c ivout ARPACK utility routine that prints integers. |
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138 c arscnd ARPACK utility routine for timing. |
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139 c cmout ARPACK utility routine that prints matrices |
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140 c cvout ARPACK utility routine that prints vectors. |
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141 c svout ARPACK utility routine that prints vectors. |
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142 c slamch LAPACK routine that determines machine constants. |
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143 c slapy2 LAPACK routine to compute sqrt(x**2+y**2) carefully. |
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144 c ccopy Level 1 BLAS that copies one vector to another . |
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145 c cdotc Level 1 BLAS that computes the scalar product of two vectors. |
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146 c cswap Level 1 BLAS that swaps two vectors. |
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147 c scnrm2 Level 1 BLAS that computes the norm of a vector. |
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148 c |
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149 c\Author |
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150 c Danny Sorensen Phuong Vu |
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151 c Richard Lehoucq CRPC / Rice Universitya |
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152 c Chao Yang Houston, Texas |
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153 c Dept. of Computational & |
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154 c Applied Mathematics |
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155 c Rice University |
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156 c Houston, Texas |
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157 c |
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158 c\SCCS Information: @(#) |
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159 c FILE: naup2.F SID: 2.6 DATE OF SID: 06/01/00 RELEASE: 2 |
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160 c |
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161 c\Remarks |
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162 c 1. None |
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163 c |
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164 c\EndLib |
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165 c |
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166 c----------------------------------------------------------------------- |
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167 c |
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168 subroutine cnaup2 |
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169 & ( ido, bmat, n, which, nev, np, tol, resid, mode, iupd, |
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170 & ishift, mxiter, v, ldv, h, ldh, ritz, bounds, |
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171 & q, ldq, workl, ipntr, workd, rwork, info ) |
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172 c |
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173 c %----------------------------------------------------% |
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174 c | Include files for debugging and timing information | |
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175 c %----------------------------------------------------% |
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176 c |
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177 include 'debug.h' |
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178 include 'stat.h' |
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179 c |
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180 c %------------------% |
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181 c | Scalar Arguments | |
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182 c %------------------% |
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183 c |
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184 character bmat*1, which*2 |
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185 integer ido, info, ishift, iupd, mode, ldh, ldq, ldv, mxiter, |
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186 & n, nev, np |
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187 Real |
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188 & tol |
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189 c |
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190 c %-----------------% |
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191 c | Array Arguments | |
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192 c %-----------------% |
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193 c |
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194 integer ipntr(13) |
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195 Complex |
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196 & bounds(nev+np), h(ldh,nev+np), q(ldq,nev+np), |
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197 & resid(n), ritz(nev+np), v(ldv,nev+np), |
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198 & workd(3*n), workl( (nev+np)*(nev+np+3) ) |
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199 Real |
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200 & rwork(nev+np) |
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201 c |
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202 c %------------% |
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203 c | Parameters | |
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204 c %------------% |
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205 c |
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206 Complex |
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207 & one, zero |
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208 Real |
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209 & rzero |
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210 parameter (one = (1.0E+0, 0.0E+0) , zero = (0.0E+0, 0.0E+0) , |
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211 & rzero = 0.0E+0 ) |
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212 c |
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213 c %---------------% |
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214 c | Local Scalars | |
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215 c %---------------% |
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216 c |
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217 logical cnorm , getv0, initv , update, ushift |
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218 integer ierr , iter , kplusp, msglvl, nconv, |
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219 & nevbef, nev0 , np0 , nptemp, i , |
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220 & j |
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221 Complex |
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222 & cmpnorm |
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223 Real |
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224 & rnorm , eps23, rtemp |
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225 character wprime*2 |
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226 c |
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227 save cnorm, getv0, initv , update, ushift, |
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228 & rnorm, iter , kplusp, msglvl, nconv , |
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229 & nevbef, nev0 , np0 , eps23 |
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230 c |
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231 c |
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232 c %-----------------------% |
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233 c | Local array arguments | |
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234 c %-----------------------% |
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235 c |
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236 integer kp(3) |
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237 c |
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238 c %----------------------% |
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239 c | External Subroutines | |
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240 c %----------------------% |
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241 c |
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242 external ccopy, cgetv0, cnaitr, cneigh, cngets, cnapps, |
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243 & csortc, cswap, cmout, cvout, ivout, arscnd |
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244 c |
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245 c %--------------------% |
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246 c | External functions | |
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247 c %--------------------% |
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248 c |
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249 Complex |
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250 & cdotc |
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251 Real |
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252 & scnrm2, slamch, slapy2 |
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253 external cdotc, scnrm2, slamch, slapy2 |
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254 c |
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255 c %---------------------% |
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256 c | Intrinsic Functions | |
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257 c %---------------------% |
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258 c |
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259 intrinsic aimag, real , min, max |
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260 c |
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261 c %-----------------------% |
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262 c | Executable Statements | |
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263 c %-----------------------% |
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264 c |
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265 if (ido .eq. 0) then |
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266 c |
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267 call arscnd (t0) |
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268 c |
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269 msglvl = mcaup2 |
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270 c |
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271 nev0 = nev |
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272 np0 = np |
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273 c |
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274 c %-------------------------------------% |
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275 c | kplusp is the bound on the largest | |
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276 c | Lanczos factorization built. | |
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277 c | nconv is the current number of | |
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278 c | "converged" eigenvalues. | |
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279 c | iter is the counter on the current | |
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280 c | iteration step. | |
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281 c %-------------------------------------% |
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282 c |
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283 kplusp = nev + np |
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284 nconv = 0 |
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285 iter = 0 |
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286 c |
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287 c %---------------------------------% |
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288 c | Get machine dependent constant. | |
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289 c %---------------------------------% |
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290 c |
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291 eps23 = slamch('Epsilon-Machine') |
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292 eps23 = eps23**(2.0E+0 / 3.0E+0 ) |
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293 c |
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294 c %---------------------------------------% |
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295 c | Set flags for computing the first NEV | |
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296 c | steps of the Arnoldi factorization. | |
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297 c %---------------------------------------% |
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298 c |
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299 getv0 = .true. |
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300 update = .false. |
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301 ushift = .false. |
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302 cnorm = .false. |
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303 c |
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304 if (info .ne. 0) then |
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305 c |
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306 c %--------------------------------------------% |
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307 c | User provides the initial residual vector. | |
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308 c %--------------------------------------------% |
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309 c |
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310 initv = .true. |
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311 info = 0 |
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312 else |
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313 initv = .false. |
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314 end if |
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315 end if |
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316 c |
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317 c %---------------------------------------------% |
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318 c | Get a possibly random starting vector and | |
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319 c | force it into the range of the operator OP. | |
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320 c %---------------------------------------------% |
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321 c |
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322 10 continue |
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323 c |
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324 if (getv0) then |
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325 call cgetv0 (ido, bmat, 1, initv, n, 1, v, ldv, resid, rnorm, |
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326 & ipntr, workd, info) |
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327 c |
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328 if (ido .ne. 99) go to 9000 |
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329 c |
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330 if (rnorm .eq. rzero) then |
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331 c |
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332 c %-----------------------------------------% |
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333 c | The initial vector is zero. Error exit. | |
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334 c %-----------------------------------------% |
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335 c |
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336 info = -9 |
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337 go to 1100 |
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338 end if |
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339 getv0 = .false. |
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340 ido = 0 |
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341 end if |
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342 c |
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343 c %-----------------------------------% |
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344 c | Back from reverse communication : | |
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345 c | continue with update step | |
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346 c %-----------------------------------% |
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347 c |
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348 if (update) go to 20 |
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349 c |
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350 c %-------------------------------------------% |
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351 c | Back from computing user specified shifts | |
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352 c %-------------------------------------------% |
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353 c |
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354 if (ushift) go to 50 |
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355 c |
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356 c %-------------------------------------% |
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357 c | Back from computing residual norm | |
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358 c | at the end of the current iteration | |
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359 c %-------------------------------------% |
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360 c |
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361 if (cnorm) go to 100 |
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362 c |
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363 c %----------------------------------------------------------% |
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364 c | Compute the first NEV steps of the Arnoldi factorization | |
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365 c %----------------------------------------------------------% |
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366 c |
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367 call cnaitr (ido, bmat, n, 0, nev, mode, resid, rnorm, v, ldv, |
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368 & h, ldh, ipntr, workd, info) |
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369 c |
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370 if (ido .ne. 99) go to 9000 |
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371 c |
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372 if (info .gt. 0) then |
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373 np = info |
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374 mxiter = iter |
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375 info = -9999 |
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376 go to 1200 |
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377 end if |
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378 c |
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379 c %--------------------------------------------------------------% |
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380 c | | |
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381 c | M A I N ARNOLDI I T E R A T I O N L O O P | |
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382 c | Each iteration implicitly restarts the Arnoldi | |
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383 c | factorization in place. | |
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384 c | | |
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385 c %--------------------------------------------------------------% |
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386 c |
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387 1000 continue |
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388 c |
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389 iter = iter + 1 |
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390 c |
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391 if (msglvl .gt. 0) then |
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392 call ivout (logfil, 1, iter, ndigit, |
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393 & '_naup2: **** Start of major iteration number ****') |
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394 end if |
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395 c |
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396 c %-----------------------------------------------------------% |
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397 c | Compute NP additional steps of the Arnoldi factorization. | |
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398 c | Adjust NP since NEV might have been updated by last call | |
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399 c | to the shift application routine cnapps. | |
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400 c %-----------------------------------------------------------% |
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401 c |
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402 np = kplusp - nev |
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403 c |
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404 if (msglvl .gt. 1) then |
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405 call ivout (logfil, 1, nev, ndigit, |
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406 & '_naup2: The length of the current Arnoldi factorization') |
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407 call ivout (logfil, 1, np, ndigit, |
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408 & '_naup2: Extend the Arnoldi factorization by') |
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409 end if |
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410 c |
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411 c %-----------------------------------------------------------% |
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412 c | Compute NP additional steps of the Arnoldi factorization. | |
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413 c %-----------------------------------------------------------% |
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414 c |
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415 ido = 0 |
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416 20 continue |
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417 update = .true. |
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418 c |
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419 call cnaitr(ido, bmat, n, nev, np, mode, resid, rnorm, |
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420 & v , ldv , h, ldh, ipntr, workd, info) |
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421 c |
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422 if (ido .ne. 99) go to 9000 |
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423 c |
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424 if (info .gt. 0) then |
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425 np = info |
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426 mxiter = iter |
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427 info = -9999 |
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428 go to 1200 |
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429 end if |
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430 update = .false. |
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431 c |
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432 if (msglvl .gt. 1) then |
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433 call svout (logfil, 1, rnorm, ndigit, |
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434 & '_naup2: Corresponding B-norm of the residual') |
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435 end if |
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436 c |
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437 c %--------------------------------------------------------% |
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438 c | Compute the eigenvalues and corresponding error bounds | |
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439 c | of the current upper Hessenberg matrix. | |
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440 c %--------------------------------------------------------% |
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441 c |
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442 call cneigh (rnorm, kplusp, h, ldh, ritz, bounds, |
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443 & q, ldq, workl, rwork, ierr) |
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444 c |
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445 if (ierr .ne. 0) then |
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446 info = -8 |
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447 go to 1200 |
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448 end if |
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449 c |
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450 c %---------------------------------------------------% |
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451 c | Select the wanted Ritz values and their bounds | |
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452 c | to be used in the convergence test. | |
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453 c | The wanted part of the spectrum and corresponding | |
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454 c | error bounds are in the last NEV loc. of RITZ, | |
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455 c | and BOUNDS respectively. | |
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456 c %---------------------------------------------------% |
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457 c |
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458 nev = nev0 |
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459 np = np0 |
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460 c |
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461 c %--------------------------------------------------% |
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462 c | Make a copy of Ritz values and the corresponding | |
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463 c | Ritz estimates obtained from cneigh. | |
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464 c %--------------------------------------------------% |
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465 c |
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466 call ccopy(kplusp,ritz,1,workl(kplusp**2+1),1) |
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467 call ccopy(kplusp,bounds,1,workl(kplusp**2+kplusp+1),1) |
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468 c |
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469 c %---------------------------------------------------% |
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470 c | Select the wanted Ritz values and their bounds | |
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471 c | to be used in the convergence test. | |
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472 c | The wanted part of the spectrum and corresponding | |
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473 c | bounds are in the last NEV loc. of RITZ | |
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474 c | BOUNDS respectively. | |
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475 c %---------------------------------------------------% |
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476 c |
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477 call cngets (ishift, which, nev, np, ritz, bounds) |
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478 c |
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479 c %------------------------------------------------------------% |
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480 c | Convergence test: currently we use the following criteria. | |
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481 c | The relative accuracy of a Ritz value is considered | |
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482 c | acceptable if: | |
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483 c | | |
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484 c | error_bounds(i) .le. tol*max(eps23, magnitude_of_ritz(i)). | |
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485 c | | |
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486 c %------------------------------------------------------------% |
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487 c |
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488 nconv = 0 |
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489 c |
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490 do 25 i = 1, nev |
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491 rtemp = max( eps23, slapy2( real (ritz(np+i)), |
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492 & aimag(ritz(np+i)) ) ) |
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493 if ( slapy2(real (bounds(np+i)),aimag(bounds(np+i))) |
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494 & .le. tol*rtemp ) then |
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495 nconv = nconv + 1 |
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496 end if |
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497 25 continue |
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498 c |
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499 if (msglvl .gt. 2) then |
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500 kp(1) = nev |
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501 kp(2) = np |
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502 kp(3) = nconv |
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503 call ivout (logfil, 3, kp, ndigit, |
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504 & '_naup2: NEV, NP, NCONV are') |
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505 call cvout (logfil, kplusp, ritz, ndigit, |
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506 & '_naup2: The eigenvalues of H') |
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507 call cvout (logfil, kplusp, bounds, ndigit, |
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508 & '_naup2: Ritz estimates of the current NCV Ritz values') |
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509 end if |
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510 c |
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511 c %---------------------------------------------------------% |
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512 c | Count the number of unwanted Ritz values that have zero | |
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513 c | Ritz estimates. If any Ritz estimates are equal to zero | |
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514 c | then a leading block of H of order equal to at least | |
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515 c | the number of Ritz values with zero Ritz estimates has | |
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516 c | split off. None of these Ritz values may be removed by | |
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517 c | shifting. Decrease NP the number of shifts to apply. If | |
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518 c | no shifts may be applied, then prepare to exit | |
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519 c %---------------------------------------------------------% |
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520 c |
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521 nptemp = np |
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522 do 30 j=1, nptemp |
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523 if (bounds(j) .eq. zero) then |
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524 np = np - 1 |
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525 nev = nev + 1 |
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526 end if |
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527 30 continue |
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528 c |
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529 if ( (nconv .ge. nev0) .or. |
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530 & (iter .gt. mxiter) .or. |
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531 & (np .eq. 0) ) then |
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532 c |
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533 if (msglvl .gt. 4) then |
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534 call cvout(logfil, kplusp, workl(kplusp**2+1), ndigit, |
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535 & '_naup2: Eigenvalues computed by _neigh:') |
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536 call cvout(logfil, kplusp, workl(kplusp**2+kplusp+1), |
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537 & ndigit, |
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538 & '_naup2: Ritz estimates computed by _neigh:') |
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539 end if |
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540 c |
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541 c %------------------------------------------------% |
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542 c | Prepare to exit. Put the converged Ritz values | |
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543 c | and corresponding bounds in RITZ(1:NCONV) and | |
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544 c | BOUNDS(1:NCONV) respectively. Then sort. Be | |
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545 c | careful when NCONV > NP | |
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546 c %------------------------------------------------% |
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547 c |
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548 c %------------------------------------------% |
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549 c | Use h( 3,1 ) as storage to communicate | |
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550 c | rnorm to cneupd if needed | |
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551 c %------------------------------------------% |
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552 |
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553 h(3,1) = cmplx(rnorm,rzero) |
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554 c |
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555 c %----------------------------------------------% |
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556 c | Sort Ritz values so that converged Ritz | |
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557 c | values appear within the first NEV locations | |
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558 c | of ritz and bounds, and the most desired one | |
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559 c | appears at the front. | |
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560 c %----------------------------------------------% |
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561 c |
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562 if (which .eq. 'LM') wprime = 'SM' |
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563 if (which .eq. 'SM') wprime = 'LM' |
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564 if (which .eq. 'LR') wprime = 'SR' |
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565 if (which .eq. 'SR') wprime = 'LR' |
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|
566 if (which .eq. 'LI') wprime = 'SI' |
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|
567 if (which .eq. 'SI') wprime = 'LI' |
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568 c |
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569 call csortc(wprime, .true., kplusp, ritz, bounds) |
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570 c |
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571 c %--------------------------------------------------% |
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572 c | Scale the Ritz estimate of each Ritz value | |
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|
573 c | by 1 / max(eps23, magnitude of the Ritz value). | |
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574 c %--------------------------------------------------% |
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575 c |
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576 do 35 j = 1, nev0 |
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577 rtemp = max( eps23, slapy2( real (ritz(j)), |
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578 & aimag(ritz(j)) ) ) |
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579 bounds(j) = bounds(j)/rtemp |
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580 35 continue |
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581 c |
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582 c %---------------------------------------------------% |
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583 c | Sort the Ritz values according to the scaled Ritz | |
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584 c | estimates. This will push all the converged ones | |
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585 c | towards the front of ritz, bounds (in the case | |
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586 c | when NCONV < NEV.) | |
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587 c %---------------------------------------------------% |
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588 c |
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589 wprime = 'LM' |
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590 call csortc(wprime, .true., nev0, bounds, ritz) |
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591 c |
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592 c %----------------------------------------------% |
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593 c | Scale the Ritz estimate back to its original | |
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594 c | value. | |
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595 c %----------------------------------------------% |
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596 c |
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597 do 40 j = 1, nev0 |
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598 rtemp = max( eps23, slapy2( real (ritz(j)), |
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599 & aimag(ritz(j)) ) ) |
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600 bounds(j) = bounds(j)*rtemp |
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601 40 continue |
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602 c |
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603 c %-----------------------------------------------% |
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604 c | Sort the converged Ritz values again so that | |
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605 c | the "threshold" value appears at the front of | |
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606 c | ritz and bound. | |
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607 c %-----------------------------------------------% |
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608 c |
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609 call csortc(which, .true., nconv, ritz, bounds) |
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610 c |
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611 if (msglvl .gt. 1) then |
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612 call cvout (logfil, kplusp, ritz, ndigit, |
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613 & '_naup2: Sorted eigenvalues') |
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614 call cvout (logfil, kplusp, bounds, ndigit, |
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615 & '_naup2: Sorted ritz estimates.') |
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616 end if |
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617 c |
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618 c %------------------------------------% |
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619 c | Max iterations have been exceeded. | |
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620 c %------------------------------------% |
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621 c |
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622 if (iter .gt. mxiter .and. nconv .lt. nev0) info = 1 |
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623 c |
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624 c %---------------------% |
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625 c | No shifts to apply. | |
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626 c %---------------------% |
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627 c |
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628 if (np .eq. 0 .and. nconv .lt. nev0) info = 2 |
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629 c |
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630 np = nconv |
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631 go to 1100 |
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632 c |
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633 else if ( (nconv .lt. nev0) .and. (ishift .eq. 1) ) then |
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634 c |
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635 c %-------------------------------------------------% |
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636 c | Do not have all the requested eigenvalues yet. | |
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637 c | To prevent possible stagnation, adjust the size | |
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638 c | of NEV. | |
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639 c %-------------------------------------------------% |
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640 c |
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641 nevbef = nev |
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642 nev = nev + min(nconv, np/2) |
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643 if (nev .eq. 1 .and. kplusp .ge. 6) then |
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644 nev = kplusp / 2 |
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645 else if (nev .eq. 1 .and. kplusp .gt. 3) then |
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646 nev = 2 |
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647 end if |
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648 np = kplusp - nev |
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649 c |
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650 c %---------------------------------------% |
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651 c | If the size of NEV was just increased | |
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652 c | resort the eigenvalues. | |
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653 c %---------------------------------------% |
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654 c |
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655 if (nevbef .lt. nev) |
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656 & call cngets (ishift, which, nev, np, ritz, bounds) |
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657 c |
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658 end if |
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659 c |
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660 if (msglvl .gt. 0) then |
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661 call ivout (logfil, 1, nconv, ndigit, |
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changeset
|
662 & '_naup2: no. of "converged" Ritz values at this iter.') |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
663 if (msglvl .gt. 1) then |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
664 kp(1) = nev |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
665 kp(2) = np |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
666 call ivout (logfil, 2, kp, ndigit, |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
667 & '_naup2: NEV and NP are') |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
668 call cvout (logfil, nev, ritz(np+1), ndigit, |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
669 & '_naup2: "wanted" Ritz values ') |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
670 call cvout (logfil, nev, bounds(np+1), ndigit, |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
671 & '_naup2: Ritz estimates of the "wanted" values ') |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
672 end if |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
673 end if |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
674 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
675 if (ishift .eq. 0) then |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
676 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
677 c %-------------------------------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
678 c | User specified shifts: pop back out to get the shifts | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
679 c | and return them in the first 2*NP locations of WORKL. | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
680 c %-------------------------------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
681 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
682 ushift = .true. |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
683 ido = 3 |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
684 go to 9000 |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
685 end if |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
686 50 continue |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
687 ushift = .false. |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
688 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
689 if ( ishift .ne. 1 ) then |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
690 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
691 c %----------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
692 c | Move the NP shifts from WORKL to | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
693 c | RITZ, to free up WORKL | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
694 c | for non-exact shift case. | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
695 c %----------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
696 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
697 call ccopy (np, workl, 1, ritz, 1) |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
698 end if |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
699 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
700 if (msglvl .gt. 2) then |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
701 call ivout (logfil, 1, np, ndigit, |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
702 & '_naup2: The number of shifts to apply ') |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
703 call cvout (logfil, np, ritz, ndigit, |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
704 & '_naup2: values of the shifts') |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
705 if ( ishift .eq. 1 ) |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
706 & call cvout (logfil, np, bounds, ndigit, |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
707 & '_naup2: Ritz estimates of the shifts') |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
708 end if |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
709 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
710 c %---------------------------------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
711 c | Apply the NP implicit shifts by QR bulge chasing. | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
712 c | Each shift is applied to the whole upper Hessenberg | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
713 c | matrix H. | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
714 c | The first 2*N locations of WORKD are used as workspace. | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
715 c %---------------------------------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
716 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
717 call cnapps (n, nev, np, ritz, v, ldv, |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
718 & h, ldh, resid, q, ldq, workl, workd) |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
719 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
720 c %---------------------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
721 c | Compute the B-norm of the updated residual. | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
722 c | Keep B*RESID in WORKD(1:N) to be used in | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
723 c | the first step of the next call to cnaitr. | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
724 c %---------------------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
725 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
726 cnorm = .true. |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
727 call arscnd (t2) |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
728 if (bmat .eq. 'G') then |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
729 nbx = nbx + 1 |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
730 call ccopy (n, resid, 1, workd(n+1), 1) |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
731 ipntr(1) = n + 1 |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
732 ipntr(2) = 1 |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
733 ido = 2 |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
734 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
735 c %----------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
736 c | Exit in order to compute B*RESID | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
737 c %----------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
738 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
739 go to 9000 |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
740 else if (bmat .eq. 'I') then |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
741 call ccopy (n, resid, 1, workd, 1) |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
742 end if |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
743 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
744 100 continue |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
745 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
746 c %----------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
747 c | Back from reverse communication; | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
748 c | WORKD(1:N) := B*RESID | |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
749 c %----------------------------------% |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
750 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
751 if (bmat .eq. 'G') then |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
752 call arscnd (t3) |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
753 tmvbx = tmvbx + (t3 - t2) |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
754 end if |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
755 c |
9f5d2ef078e8
import ARPACK sources to libcruft from Debian package libarpack2 2.1+parpack96.dfsg-3+b1
John W. Eaton <jwe@octave.org>
parents:
diff
changeset
|
756 if (bmat .eq. 'G') then |
9f5d2ef078e8
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757 cmpnorm = cdotc (n, resid, 1, workd, 1) |
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758 rnorm = sqrt(slapy2(real (cmpnorm),aimag(cmpnorm))) |
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759 else if (bmat .eq. 'I') then |
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760 rnorm = scnrm2(n, resid, 1) |
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761 end if |
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762 cnorm = .false. |
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763 c |
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764 if (msglvl .gt. 2) then |
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765 call svout (logfil, 1, rnorm, ndigit, |
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766 & '_naup2: B-norm of residual for compressed factorization') |
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767 call cmout (logfil, nev, nev, h, ldh, ndigit, |
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768 & '_naup2: Compressed upper Hessenberg matrix H') |
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769 end if |
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770 c |
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771 go to 1000 |
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772 c |
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773 c %---------------------------------------------------------------% |
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774 c | | |
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775 c | E N D O F M A I N I T E R A T I O N L O O P | |
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776 c | | |
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777 c %---------------------------------------------------------------% |
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778 c |
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779 1100 continue |
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780 c |
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781 mxiter = iter |
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782 nev = nconv |
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783 c |
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784 1200 continue |
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785 ido = 99 |
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786 c |
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787 c %------------% |
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788 c | Error Exit | |
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789 c %------------% |
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790 c |
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791 call arscnd (t1) |
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792 tcaup2 = t1 - t0 |
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793 c |
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794 9000 continue |
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795 c |
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796 c %---------------% |
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797 c | End of cnaup2 | |
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798 c %---------------% |
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799 c |
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800 return |
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801 end |