Comment #5 on issue 959 by asmeurer: make sympy do vector manipulations http://code.google.com/p/sympy/issues/detail?id=959
I agree. exp(Matrix) should raise an exception if it isn't square. For vector manipulations, there should be a separate array class.
By the way, applyfunc isn't very good for advanced functions. In the general case, you have to pass a lambda. So this array type would definitely be useful to anyone wanting to do these kinds of calculations.
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