#19040: defuse bool(x!=0) performance bomb
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Reporter: rws | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.9
Component: symbolics | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Symbolics may be part of type-neutral computations, e.g. matrices, rings.
Developers do not expect proof machinery to crank up when writing `if
x!=0`, so `bool(x1!=x2)` should mean `not (x1-x2).is_trivial_zero()` for
symbolic `x`. Instead of `Expression.__nonzero__` this ticket should
provide a different interface for cases requiring simplification/proof.
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Ticket URL: <http://trac.sagemath.org/ticket/19040>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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