#20843: Fraction not cancelled by Expression.normalize()
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Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.3
Component: symbolics | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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{{{
sage: var('a y')
(a, y)
sage: f = ((x - 2*y)^4/(x^2 - 4*y^2)^2 + 1)*(y + a)*(2*y + x) / (4*y^2 +
x^2)
sage: f.normalize()
2*(x^4 - 4*x^3*y + 8*x^2*y^2 - 16*x*y^3 + 16*y^4)*(a + y)*(x + 2*y)/((x^2
+ 4*y^2)*(x^2 - 4*y^2)^2)
sage: ((x - 2*y)^4/(x^2 - 4*y^2)^2).normalize()
(x - 2*y)^4/(x^2 - 4*y^2)^2
}}}
This bug (also in current GiNaC) is fixed in recent Pynac.
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Ticket URL: <http://trac.sagemath.org/ticket/20843>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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