#17441: Change ring fails for SchemeMorphism_polynomial defined with fraction
field
elements
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Reporter: gjorgenson | Owner:
Type: defect | Status: new
Priority: minor | Milestone: sage-6.5
Component: algebraic geometry | Keywords:
Merged in: | Authors: Grayson Jorgenson
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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If a SchemeMorphism_polynomial is defined with fraction field elements,
change ring fails; in that case, change_ring should be called on the
numerator and denominator:
{{{
A.<x,y>=AffineSpace(QQ,2)
H=Hom(A,A)
f=H([3*x^2/y,y^2/x])
f.change_ring(RR)
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/17441>
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