Comment #12 on issue 2068 by [email protected]: integrate(Integral(f(x), x), x) fails
http://code.google.com/p/sympy/issues/detail?id=2068

Last post for the night/morning, I think.

Fixed:
In [4]: integrate(Integral(f(x), x), x)
Out[4]: Integral(f(x), x)

Which led to:
In [4]: integrate(Integral(f(x), y), x)
Out[4]: Integral(y*f(x),y, x)

Which I decided to try and figure out and fix, which led to:

In [4]: integrate(Integral(f(x), y), x)
Out[4]: Integral(y*f(x), x)

Tests added. Results:

tests finished: 2344 passed, 1 failed, 10 skipped, 57 expected to fail,
1 expected to fail but passed, in 289.40 seconds

vs. master result:

tests finished: 2343 passed, 2 failed, 10 skipped, 57 expected to fail,
1 expected to fail but passed, in 281.92 seconds

Seems a test (one of the fails) mysteriously vanished, though. I seem to be a test short, at the very least.

Anyways, think I finally finished this. Going to go ahead and pull request, I think.

https://github.com/ksiondag/sympy/tree/2068_integrate


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