--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/liboctave/numeric/schur.h	Mon Feb 15 20:06:12 2016 -0500
@@ -0,0 +1,105 @@
+/*
+
+Copyright (C) 1994-2015 John W. Eaton
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+Octave is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, see
+<http://www.gnu.org/licenses/>.
+
+*/
+
+#if ! defined (octave_schur_h)
+#define octave_schur_h 1
+
+#include "octave-config.h"
+
+#include <iosfwd>
+#include <string>
+
+#include "dMatrix.h"
+#include "CMatrix.h"
+#include "fMatrix.h"
+#include "fCMatrix.h"
+
+template <typename T> class schur;
+
+template <typename T>
+class
+schur
+{
+public:
+
+  schur (void) : schur_mat (), unitary_mat () { }
+
+  schur (const T& a, const std::string& ord, bool calc_unitary = true)
+    : schur_mat (), unitary_mat ()
+  {
+    init (a, ord, calc_unitary);
+  }
+
+  schur (const T& a, const std::string& ord, octave_idx_type& info,
+         bool calc_unitary = true)
+    : schur_mat (), unitary_mat ()
+  {
+    info = init (a, ord, calc_unitary);
+  }
+
+  // This one should really be protected or private but we need it in
+  // rsf2csf and I don't see how to make that function a friend of
+  // this class.
+  schur (const T& s, const T& u) : schur_mat (s), unitary_mat (u) { }
+
+  schur (const schur& a)
+
+    : schur_mat (a.schur_mat), unitary_mat (a.unitary_mat)
+  { }
+
+  schur& operator = (const schur& a)
+  {
+    if (this != &a)
+      {
+        schur_mat = a.schur_mat;
+        unitary_mat = a.unitary_mat;
+      }
+
+    return *this;
+  }
+
+  ~schur (void) { }
+
+  T schur_matrix (void) const { return schur_mat; }
+
+  T unitary_matrix (void) const { return unitary_mat; }
+
+protected:
+
+private:
+
+  T schur_mat;
+  T unitary_mat;
+
+  octave_idx_type
+  init (const T& a, const std::string& ord, bool calc_unitary);
+};
+
+template <typename RT, typename AT>
+extern schur<RT>
+rsf2csf (const AT& s, const AT& u);
+
+template <typename T>
+extern std::ostream&
+operator << (std::ostream& os, const schur<T>& a);
+
+#endif