Hello! On Sat Jul 29 00:36:24 CEST 2006, Chris Dams wrote:
Another thing: What is the idea of the answer to the question "I wish to mix matrices and indexed objects. How can that be done?"?
My idea was to explain that tensors (`indexed') and matrices/arrays are fundamentally different. People don't seem to realize that, see, e.g. http://www.ginac.de/pipermail/ginac-list/2005-June/000667.html http://www.cebix.net/pipermail/ginac-list/2004-December/000576.html
I see a very strange expression there with three indices that are apparently contracted. However, we don't want to encourage our users to start typing that kind of garbage, do we?
But even GiNaC developers *do* write such things, see: http://thep.physik.uni-mainz.de/pipermail/ginac-list/2005-April/000638.html Best regards, Alexei. -- All science is either physics or stamp collecting.