Status: Valid
Owner: ----
Labels: Type-Defect Priority-Medium Integration
New issue 3647 by [email protected]: Require explicit assumptions when
integrating.
http://code.google.com/p/sympy/issues/detail?id=3647
Below, the integration code basically assumes n != 0 and y != 1.
from sympy import exp, integrate
from sympy.abc import n, x, y
integrate(y**x, x)
y**x/log(y)
integrate(y**(n*x), x)
y**(n*x)/(n*log(y))
integrate(exp(n*x), x)
exp(n*x)/n
I think it should return a Piecewise if we cannot rule out the special
cases n = 0 or y = 1 based on assumptions.
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