#17879: wrong ex.substitution of x*y
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Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.6
Component: symbolics | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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{{{
sage: x,y = var('x,y')
sage: f = x*y + x^2*y^2 + x*y^2
sage: f.subs({x*y:u})
x^2*y^2 + x*y^2 + u
}}}
This is from http://ask.sagemath.org/question/25972/substitute-xy-by-u/
It seems the current substitution system is not sophisticated enough to
get the expected result.
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Ticket URL: <http://trac.sagemath.org/ticket/17879>
Sage <http://www.sagemath.org>
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