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jasongrout/gist:1010165

Created June 6, 2011 12:33
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Efficient sum that doesn't try to simplify in Sage
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gistfile1.py
def fsum(x,a):
g(x) = 1/2
list_of_terms=[2*(((-1)^n-1)/(n*pi)^2*cos(n*pi*x)-(-1)^n/(n*pi)*sin(n*pi*x)) for n in [1..a]]
g += sum(list_of_terms)
return g
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