* This program is based on work by
* Isabella Bierenbaum <bierenbaum@thep.physik.uni-mainz.de> and
* Dirk Kreimer <dkreimer@bu.edu>.
- * For details, please ask for the diploma theses of Isabella Bierenbaum.
+ * For details, please see <http://www.arXiv.org/abs/hep-th/0111192>.
*/
/*
// utility functions
+
+/** Compare two objects of class quickly without doing a deep tree traversal.
+ * @return "true" if they are equal
+ * "false" if equality cannot be established quickly (e1 and e2 may
+ * still be equal, in this case. */
inline bool are_ex_trivially_equal(const ex &e1, const ex &e2)
{
return e1.bp == e2.bp;