Updates:
Labels: Assumptions
Comment #21 on issue 1932 by [email protected]: Relationals do not work
with any methods of Expr
http://code.google.com/p/sympy/issues/detail?id=1932
Yes. You can work with inequalities, but only if you know if they are
increasing or decreasing on the given domain (and monotonicity matters for
strict inequalities). For Ne you need to know if the operation is
one-to-one. So it's doable, but the assumptions system will need to be
extended.
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