Comment #18 on issue 3184 by smi...@gmail.com: 0**I giving wrong answer http://code.google.com/p/sympy/issues/detail?id=3184
We might want to look into the ask imaginary handler to see why it was giving the wrong result
Note that 0**I evaluates to nan and nan is not anything in the new assumptions: not real, not complex, not imaginary, ... The old system gives None for each of these queries:
ask(Q.real(nan))
False
ask(Q.imaginary(nan))
False
ask(Q.complex(nan))
False
nan.is_real nan.is_complex nan.is_imaginary
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