Comment #1 on issue 2756 by [email protected]: Implement MatrixFunction
http://code.google.com/p/sympy/issues/detail?id=2756
Hrm, the Symbol(...)(t) syntax is new to me.
A temporary fix might be to disable this syntax for MatrixSymbols until
someone builds a MatrixFunction class. I may get to this but its not likely
to be in the immediate future.
More long term is the goal here to have matrix valued functions? What are
some compelling use cases? Most of the time when I think of derivatives and
matrices I think more of gradients of vector valued functions, not
differentiating w.r.t. a matrix symbol (although this happens too of
course).
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