By the way, when I was referring to an external tensor index symmetry container, I meant something like what I'm doing here for the tensor components:
https://github.com/sympy/sympy/pull/2805 This PR solves the issues of associating tensor components data to tensor objects. Previously they were injected into the tensor classes, this created problems as that info was lost when the tensor was rebuilt through .func . Now there is an external dictionary mapping the tensor objects to the components data (which are numpy ndarrays). In any case, what about this PR? Any further suggestions/issues? The tensor index symmetry could as well be stored into a global dictionary, that's an idea. But in reality, I think the unify/rewriterule would seamlessly work even if the tensor index symmetry is still stored inside the arg-tree. Anyway, please review #2805, so that we can finally solve some urgent issues about components data of tensors, as well as some bugs previously reported on this mailing list. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/ddb62586-fb88-4ec3-a894-137fa13a8d8f%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
