Sorry for the duplicate post; when my first question did not appear, I
posted another. I did not realize that every question is held for
moderation. Moderators, feel free to delete this thread.
On Sunday, October 21, 2012 11:20:11 AM UTC+3, David Ketcheson wrote:
>
> I would like to write expressions involving the equivalents of MATLAB's
> "*" and ".*"; i.e.
>
> A*(B.*C)
>
> should mean
>
> \sum_j A_{ij} ( \sum_{pq} B_{pq} * C_{pq} )_{jk}.
>
> I don't want to actually instantiate matrices because I don't care to
> specify their shape or to index into them. Really I just need two kinds of
> multiplication of non-commutative symbols. Is this possible in Sympy?
>
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