*
* 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
*
* 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
* @param v Start of expression vector
* @param symm Root node of symmetry tree
* @return the overall sign introduced by the reordering (+1, -1 or 0)
* @param v Start of expression vector
* @param symm Root node of symmetry tree
* @return the overall sign introduced by the reordering (+1, -1 or 0)
extern int canonicalize(exvector::iterator v, const symmetry &symm);
/** Symmetrize expression over a set of objects (symbols, indices). */
extern int canonicalize(exvector::iterator v, const symmetry &symm);
/** Symmetrize expression over a set of objects (symbols, indices). */