alex wrote:
> How can i compute the matrix multiplication (product) of two symbolic
> matrices in sage ?
>
> I have tried:
> A = maxima("matrix ([a, b], [c, d])")
> AI= A.invert()
>
> and
> A * AI
> gives
> matrix([a*d/(a*d-b*c),-b^2/(a*d-b*c)],[-c^2/(a*d-b*c),a*d/(a*d-b*c)])
>
> so * is not the matrix product.
For the record, "." is the noncommutative product operator in Maxima
(while "*" is commutative). Dunno if it matters, hope this helps.
Robert Dodier
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