#15571: Incorrect zero test of complex symbolic expressions
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Reporter: mmezzarobba | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.1
Component: symbolics | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Yet another example where symbolic expressions are abusively considered
equivalent, even though `simplify()` has become a bit more careful.
{{{
sage: var('a,x')
(a, x)
sage: assume(a, 'complex')
sage: assume(x, 'complex')
sage: expr = a^(4*x) - (a^4)^x
sage: expr.is_zero()
True
sage: expr(a=I, x=1/2)
-2
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/15571>
Sage <http://www.sagemath.org>
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