Status: Accepted
Owner: asmeurer
Labels: Type-Defect Priority-Medium
New issue 2664 by asmeurer: sign(x) should reduce to x/abs(x) when x is
known to not be 0
http://code.google.com/p/sympy/issues/detail?id=2664
sign(x) == x/abs(x) when x != 0 and 0 when x == 0. A lot of expressions
would simplify better if it returned x/abs(x) when x is known not to be
zero. For example, sign(1 + I) right now does nothing, but it could reduce
to sqrt(2)/2*(1 + I).
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