new file mode 100644
--- /dev/null
+++ b/liboctave/base-lu.cc
@@ -0,0 +1,105 @@
+//                                        -*- C++ -*-
+/*
+
+Copyright (C) 1996 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, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if defined (__GNUG__)
+#pragma implementation
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "base-lu.h"
+
+template <class lu_type, class p_type>
+lu_type
+base_lu <lu_type, p_type> :: L (void) const
+{
+  int n = ipvt.length ();
+
+  lu_type l (n, n, 0.0);
+
+  for (int i = 0; i < n; i++)
+    {
+      l.xelem (i, i) = 1.0;
+      for (int j = 0; j < i; j++)
+	l.xelem (i, j) = a_fact.xelem (i, j);
+    }
+
+  return l;
+}
+
+template <class lu_type, class p_type>
+lu_type
+base_lu <lu_type, p_type> :: U (void) const
+{
+  int n = ipvt.length ();
+
+  lu_type u (n, n, 0.0);
+
+  for (int i = 0; i < n; i++)
+    {
+      for (int j = i; j < n; j++)
+	u.xelem (i, j) = a_fact.xelem (i, j);
+    }
+
+  return u;
+}
+
+template <class lu_type, class p_type>
+p_type
+base_lu <lu_type, p_type> :: P (void) const
+{
+  int n = ipvt.length ();
+
+  Array<int> pvt (n);
+
+  for (int i = 0; i < n; i++)
+    pvt.xelem (i) = i;
+
+  for (int i = 0; i < n - 1; i++)
+    {
+      int k = ipvt.xelem (i);
+
+      if (k != i)
+	{
+	  int tmp = pvt.xelem (k);
+	  pvt.xelem (k) = pvt.xelem (i);
+	  pvt.xelem (i) = tmp;
+	}
+    }
+
+  p_type p (n, n, 0.0);
+
+  for (int i = 0; i < n; i++)
+    p.xelem (i, pvt.xelem (i)) = 1.0;
+
+  return p;
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/