new file mode 100644
--- /dev/null
+++ b/liboctave/dbleLU.h
@@ -0,0 +1,103 @@
+//                                  -*- C++ -*-
+/*
+
+Copyright (C) 1992, 1993, 1994 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 2, 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, write to the Free
+Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#if !defined (octave_LU_h)
+#define octave_LU_h 1
+
+#if defined (__GNUG__)
+#pragma interface
+#endif
+
+class ostream;
+
+#include "dMatrix.h"
+
+extern "C++" {
+
+class LU
+{
+friend class Matrix;
+
+public:
+
+  LU (void) {}
+
+  LU (const Matrix& a);
+
+  LU (const LU& a);
+
+  LU& operator = (const LU& a);
+
+  Matrix L (void) const;
+  Matrix U (void) const;
+  Matrix P (void) const;
+
+  friend ostream&  operator << (ostream& os, const LU& a);
+
+private:
+
+  Matrix l;
+  Matrix u;
+  Matrix p;
+};
+
+inline LU::LU (const LU& a)
+{
+  l = a.l;
+  u = a.u;
+  p = a.p;
+}
+
+inline LU& LU::operator = (const LU& a)
+{
+  l = a.l;
+  u = a.u;
+  p = a.p;
+  return *this;
+}
+
+inline Matrix LU::L (void) const
+{
+  return l;
+}
+
+inline Matrix LU::U (void) const
+{
+  return u;
+}
+
+inline Matrix LU::P (void) const
+{
+  return p;
+}
+
+} // extern "C++"
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/