new file mode 100644
--- /dev/null
+++ b/liboctave/LinConst.h
@@ -0,0 +1,134 @@
+// LinConst.h                                                -*- C++ -*-
+/*
+
+Copyright (C) 1992, 1993 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 (_LinConst_h)
+#define _LinConst_h 1
+
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+#include <float.h>
+#include "Matrix.h"
+#include "Bounds.h"
+
+#ifndef Vector
+#define Vector ColumnVector
+#endif
+
+class LinConst : public Bounds
+{
+public:
+
+  LinConst (void);
+  LinConst (int nclin, int nx);
+
+  LinConst (int nclin_eq, int nclin_ineq, int nx);
+
+  LinConst (const Vector& lb, const Matrix& A, const Vector& ub);
+
+  LinConst (const Matrix& A_eq, const Vector& b_eq,
+	    const Matrix& A_ineq, const Vector& b_ineq);
+
+  LinConst (const LinConst& a);
+
+  LinConst& operator = (const LinConst& a);
+
+  LinConst& resize (int nclin, int n);
+
+  Matrix constraint_matrix (void) const;
+
+  LinConst& set_constraint_matrix (const Matrix& A);
+
+  Matrix eq_constraint_matrix (void) const;
+  Matrix ineq_constraint_matrix (void) const;
+
+  Vector eq_constraint_vector (void) const;
+  Vector ineq_constraint_vector (void) const;
+
+  friend ostream& operator << (ostream& os, const LinConst& b);
+
+protected:
+
+  Matrix A;
+
+private:
+
+  void error (const char *msg);
+
+};
+
+inline LinConst::LinConst (void) : Bounds () {}
+
+inline LinConst::LinConst (int nc, int n) : Bounds (nc), A (nb, n) {}
+
+inline LinConst::LinConst (int eq, int ineq, int n)
+  : Bounds (eq+ineq), A (nb, n) {}
+
+inline LinConst::LinConst (const Vector& l, const Matrix& amat,
+			   const Vector& u)
+  : Bounds (l, u), A (amat)
+{
+  if (nb != amat.rows ())
+    error ("inconsistent sizes for constraint matrix and bounds vectors");
+}
+
+inline LinConst::LinConst (const LinConst& a)
+  : Bounds (a.lb, a.ub), A (a.constraint_matrix ()) {}
+
+inline LinConst&
+LinConst::operator = (const LinConst& a)
+{
+  nb = a.nb;
+  lb = a.lb;
+  A  = a.A;
+  ub = a.ub;
+
+  return *this;
+}
+
+inline Matrix
+LinConst::constraint_matrix (void) const
+{
+  return A;
+}
+
+inline LinConst&
+LinConst::set_constraint_matrix (const Matrix& amat)
+{
+  if (lb.capacity () != amat.rows ())
+    error ("inconsistent size for new linear constraint matrix");
+
+  A = amat;
+
+  return *this;
+}
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/