I came across something which i think should have been solved by sympy:
> from sympy import
*> x, y, z = symbols('x y z')> n, N = symbols('n N', integer=True)>
summation(sin(n*x), (n, 1, N))
Sum(sin(n*x), (n, 1, N)) # so it returns the expression as it is
I expected the answer to be a *piece-wise* function, what's the catch in
this ?
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