inifscn_nstdsums: make functions handling Li/G transformations reentrant.

[ginac.git] / ginac / matrix.h

diff --git a/ginac/matrix.h b/ginac/matrix.h
index 08c9fe8888f547bb750e5383b88e4d4021299004..8544c9db9698a0b7cb05bc3699be3ef873dc8b05 100644 (file)
--- a/ginac/matrix.h
+++ b/ginac/matrix.h
@@ -3,7 +3,7 @@
  *  Interface to symbolic matrices */
 
 /*
- *  GiNaC Copyright (C) 1999-2006 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2008 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -151,6 +151,7 @@ public:
        matrix solve(const matrix & vars, const matrix & rhs,
                     unsigned algo = solve_algo::automatic) const;
        unsigned rank() const;
+       bool is_zero_matrix() const;
 protected:
        ex determinant_minor() const;
        int gauss_elimination(const bool det = false);