Updates:
Summary: integrate(sin(log(x**2))) always treats x as positive
Labels: WrongResult
Comment #3 on issue 1869 by [email protected]: integrate(sin(log(x**2)))
always treats x as positive
http://code.google.com/p/sympy/issues/detail?id=1869
This works quickly enough now (with generic x):
In [31]: integrate(sin(log(x**2)), x)
Out[31]:
x⋅sin(2⋅log(x)) 2⋅x⋅cos(2⋅log(x))
─────────────── - ─────────────────
5 5
but the result seems wrong for x < 0.
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