Status: Accepted
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Labels: Type-Defect Priority-Medium
New issue 1388 by ondrej.certik: integrate(exp(-x)*x**n, x) fails
http://code.google.com/p/sympy/issues/detail?id=1388
In [7]: integrate(exp(-x)*x**n, x)
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P
Updates:
Blockedon: 2712
Comment #6 on issue 1388 by asmeu...@gmail.com: integrate(exp(-x)*x**n, x)
fails
http://code.google.com/p/sympy/issues/detail?id=1388
There is a test for this in gsoc-3.
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Updates:
Status: Fixed
Comment #7 on issue 1388 by ness...@gmail.com: integrate(exp(-x)*x**n, x)
fails
http://code.google.com/p/sympy/issues/detail?id=1388
gsoc-3 was merged.
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Labels: Integration
Comment #1 on issue 1388 by asmeurer: integrate(exp(-x)*x**n, x) fails
http://code.google.com/p/sympy/issues/detail?id=1388
The solutions to integrals with symbolic powers are not easy to compute.
The solution here is (according to Maple)
int(x**n/exp(x
Updates:
Cc: ness...@googlemail.com
Comment #2 on issue 1388 by asmeurer: integrate(exp(-x)*x**n, x) fails
http://code.google.com/p/sympy/issues/detail?id=1388
(No comment was entered for this change.)
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Comment #3 on issue 1388 by ness...@googlemail.com: integrate(exp(-x)*x**n,
x) fails
http://code.google.com/p/sympy/issues/detail?id=1388
In [4]: integrate(x**y*exp(-x), x, meijerg=True)
Out[4]:
╭─╮1, 1 ⎛ 1 │ ⎞
│╶┐ ⎜ │ x⎟
╰─╯1, 2 ⎝y + 1 0 │ ⎠
In [5]: hyperexpand(_, allow
Comment #4 on issue 1388 by asmeurer: integrate(exp(-x)*x**n, x) fails
http://code.google.com/p/sympy/issues/detail?id=1388
Cool. Maybe you could add WhittakerM to your list of special functions to
add some day (this isn't high priority, though).
[Using `n` in place of `y` hangs hyperexpan
Updates:
Labels: NeedsReview ness987
Comment #5 on issue 1388 by ness...@googlemail.com: integrate(exp(-x)*x**n,
x) fails
http://code.google.com/p/sympy/issues/detail?id=1388
In gsoc-3 (https://github.com/sympy/sympy/pull/543):
In [96]: integrate(x**n*exp(-x), x, meijerg=True)
Out[96
