Hi everybody, GiNaC 1.3.4 is out and available. The changes are: - More general index dimensions are now possible. - Improved algebraic substitutions. - Fixed wrong matching in .has(). - Fixed bug in differentiation of a power. - collect_common_factors also works with negative powers of common factors now. - Code clean-up and preparations for upcoming cln 1.2. As always, this release can be downloaded from http://www.ginac.de/Download.html Best wishes, Jens