#19521: wrong inverse action when using ConstructionFunctor.coercion_reversed
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Reporter: dkrenn | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.10
Component: coercion | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by dkrenn):
BTW: For some reason it works (partially) for polynomial rings:
{{{
sage: R.<x> = SR.subring(no_variables=True)[]
sage: (x / 1).parent()
Univariate Polynomial Ring in x over Symbolic Constants Subring
}}}
but
{{{
sage: cm = sage.structure.element.get_coercion_model()
sage: cm.explain(x, 1, operator.div)
Action discovered.
Right inverse action by Symbolic Ring on Univariate Polynomial
Ring in x over Symbolic Constants Subring
with precomposition on right by Conversion map:
From: Integer Ring
To: Symbolic Ring
Result lives in Univariate Polynomial Ring in x over Symbolic Ring
Univariate Polynomial Ring in x over Symbolic Ring
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/19521#comment:1>
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