Updates:
        Status: Fixed

Comment #3 on issue 2449 by smi...@gmail.com: improve transform
http://code.google.com/p/sympy/issues/detail?id=2449

It works out of the box now and inverse is thus deprecated:

i = Integral(cos(w*t), (t, 0, 1))
i.transform(w*t, t)
Integral(cos(t)/w, (t, 0, w))
i.transform(t, w*t, inverse=True)
sympy\utilities\exceptions.py:104: SymPyDeprecationWarning:

The feature transform(x, f(x), inverse=True) is deprecated. Use
transform(f(x), x) instead.

  warning (see_above, SymPyDeprecationWarning)
Integral(cos(t)/w, (t, 0, w))


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