new file mode 100644
--- /dev/null
+++ b/src/DLD-FUNCTIONS/kron.cc
@@ -0,0 +1,120 @@
+/*
+
+Copyright (C) 2002 Paul Kienzle
+
+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.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "dMatrix.h"
+#include "CMatrix.h"
+
+#include "defun-dld.h"
+#include "error.h"
+#include "oct-obj.h"
+
+#if !defined (CXX_NEW_FRIEND_TEMPLATE_DECL)
+extern void
+kron (const Array2<double>&, const Array2<double>&, Array2<double>&);
+
+extern void
+kron (const Array2<Complex>&, const Array2<Complex>&, Array2<Complex>&);
+#endif
+
+template <class T>
+void
+kron (const Array2<T>& A, const Array2<T>& B, Array2<T>& C)
+{
+  C.resize (A.rows () * B.rows (), A.columns () * B.columns ());
+
+  int Ac, Ar, Cc, Cr;
+
+  for (Ac = Cc = 0; Ac < A.columns (); Ac++, Cc += B.columns ())
+    for (Ar = Cr = 0; Ar < A.rows (); Ar++, Cr += B.rows ())
+      {
+	const T v = A (Ar, Ac);
+	for (int Bc = 0; Bc < B.columns (); Bc++)
+	  for (int Br = 0; Br < B.rows (); Br++)
+	    C.xelem (Cr+Br, Cc+Bc) = v * B.elem (Br, Bc);
+      }
+}
+
+template void
+kron (const Array2<double>&, const Array2<double>&, Array2<double>&);
+
+template void
+kron (const Array2<Complex>&, const Array2<Complex>&, Array2<Complex>&);
+
+DEFUN_DLD (kron, args,  nargout, "-*- texinfo -*-\n\
+@deftypefn {Function File} {} kron (@var{a}, @var{b})\n\
+Form the kronecker product of two matrices, defined block by block as\n\
+\n\
+@example\n\
+x = [a(i, j) b]\n\
+@end example\n\
+\n\
+For example,\n\
+\n\
+@example\n\
+@group\n\
+kron (1:4, ones (3, 1))\n\
+      @result{}  1  2  3  4\n\
+          1  2  3  4\n\
+          1  2  3  4\n\
+@end group\n\
+@end example\n\
+@end deftypefn")
+{
+  octave_value_list retval;
+
+  int nargin = args.length ();
+
+  if (nargin != 2 || nargout > 1)
+    {
+      print_usage ("kron");
+    }
+  else if (args(0).is_complex_type () || args(1).is_complex_type ())
+    {
+      ComplexMatrix a (args(0).complex_matrix_value());
+      ComplexMatrix b (args(1).complex_matrix_value());
+
+      if (! error_state)
+	{
+	  ComplexMatrix c;
+	  kron (a, b, c);
+	  retval(0) = c;
+	}
+    }
+  else
+    {
+      Matrix a (args(0).matrix_value ());
+      Matrix b (args(1).matrix_value ());
+
+      if (! error_state)
+	{
+	  Matrix c;
+	  kron (a, b, c);
+	  retval (0) = c;
+	}
+    }
+
+  return retval;
+}