Updates:
Status: Accepted
Labels: Integration
Comment #1 on issue 2559 by asmeurer: lack definite integral of |x^2-1|
http://code.google.com/p/sympy/issues/detail?id=2559
First off, x^2 does not create x squared. You need to use x**2. See
http://docs.sympy.org/0.7.0/gotchas.html#mathematical-operators.
But anyway, I can confirm this. It seems that integrating absolute values
is not supported. Can we assert that integrate(abs(expr)) ==
abs(integrate(expr))?
In [1]: integrate(abs(x**2 - 1), x)
Out[1]:
⌠
⎮ │ 2│
⎮ │1 - x │ dx
⌡
In [2]: integrate(abs(x), x)
Out[2]:
⌠
⎮ │x│ dx
⌡
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