Updates:
Cc: Ronan.Lamy smichr Vinzent.Steinberg
Comment #10 on issue 1985 by asmeurer: as_real_imag() gives wrong answer
when expanding quotient
http://code.google.com/p/sympy/issues/detail?id=1985
So I was so convinced that my solution (refactoring expand(complex=True)
and as_real_imag()) was so much better that I went ahead and created a
patch for it. Now as_real_imag should be much more infallible, because it
does not rely on pattern matching to take the real and imaginary parts, but
rather uses the logic that was already there in expand(complex=True).
Note that some of the things in this patch will need to be refactored to
use Chris's expand hint system (like expand_multinomial). Also, patching
expand functions feels like putting a bandaid on a 4 in. flesh wound. This
whole system needs to be refactored to use the new polys and to not be so
redundant and sensitive to infinite recursion.
See http://github.com/asmeurer/sympy/tree/1985
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