#20824: Expression.coefficient() should expand beforehand
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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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There is no reason why there should be different results:
{{{
sage: (x*(x*y+y^2)).coefficient(x)
y
sage: (x*(x*y+y^2)).coefficient(x,2)
0
sage: (x*(x*y+y^2)).expand().coefficient(x)
y^2
sage: (x*(x*y+y^2)).expand().coefficient(x,2)
y
}}}
This would also be unsurprising for Mma users, see
http://trac.sagemath.org/ticket/9505#comment:6
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Ticket URL: <http://trac.sagemath.org/ticket/20824>
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