Vlamirs patch for automatically simplifying e.g., csgn(x)^3 -> csgn(x).

[ginac.git] / ginac / matrix.h

diff --git a/ginac/matrix.h b/ginac/matrix.h
index 29af2a0747d903198fa1cfa78347a5e2ab0097ba..a1ac7cbcb968883c19c68620bc73e7392d406e93 100644 (file)
--- a/ginac/matrix.h
+++ b/ginac/matrix.h
@@ -3,7 +3,7 @@
  *  Interface to symbolic matrices */
 
 /*
- *  GiNaC Copyright (C) 1999-2004 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2006 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
@@ -17,7 +17,7 @@
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
 #ifndef __GINAC_MATRIX_H__
@@ -209,12 +209,6 @@ inline unsigned rank(const matrix & m)
 
 // utility functions
 
-/** Specialization of is_exactly_a<matrix>(obj) for matrix objects. */
-template<> inline bool is_exactly_a<matrix>(const basic & obj)
-{
-       return obj.tinfo()==TINFO_matrix;
-}
-
 /** Convert list of lists to matrix. */
 extern ex lst_to_matrix(const lst & l);
 
@@ -233,6 +227,13 @@ inline ex unit_matrix(unsigned x)
  *  The base name for LaTeX output is specified separately. */
 extern ex symbolic_matrix(unsigned r, unsigned c, const std::string & base_name, const std::string & tex_base_name);
 
+/** Return the reduced matrix that is formed by deleting the rth row and cth
+ *  column of matrix m. The determinant of the result is the Minor r, c. */
+extern ex reduced_matrix(const matrix& m, unsigned r, unsigned c);
+
+/** Return the nr times nc submatrix starting at position r, c of matrix m. */
+extern ex sub_matrix(const matrix&m, unsigned r, unsigned nr, unsigned c, unsigned nc);
+
 /** Create an r times c matrix of newly generated symbols consisting of the
  *  given base name plus the numeric row/column position of each element. */
 inline ex symbolic_matrix(unsigned r, unsigned c, const std::string & base_name)