Updates:
Status: Accepted
Labels: -NeedsReview -smichr
Comment #23 on issue 2571 by [email protected]: Regression in Integral.subs
http://code.google.com/p/sympy/issues/detail?id=2571
Sorry, but I still think this isn't powerful enough. The expression from
the original post now works, which is good (this can no stop blocking issue
2010), but it doesn't work for a definite integral:
In [2]: Integral((exp(x*log(x))*log(x)), (x, 0, 1)).subs(exp(x*log(x)),
x**x)
Out[2]:
1
⌠
⎮ x⋅log(x)
⎮ ℯ ⋅log(x) dx
⌡
0
I get that there's the possibility for ambiguity if the same Symbol is both
free and bound, but that isn't even happening in this case.
So I still think that any substitution should be allowed, except if the old
is a Symbol, the new must also be a Symbol.
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