#13257: Coercion from `ZZ['x']` to `Integers(n)['x']` is VERY slow
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Reporter: jlopez | Owner: robertwb
Type: defect | Status: needs_work
Priority: major | Milestone: sage-5.7
Component: coercion | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Travis Scrimshaw | Merged in:
Dependencies: | Stopgaps:
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Changes (by robertwb):
* status: needs_review => needs_work
Comment:
Won't this patch break
{{{
sage: R.<x> = ZZ[]
sage: S.<y> = R[]
sage: S._element_constructor_(x^2)
x^2
}}}
I think polynomial_template should be fixed, at the cost of requiring a
couple more special methods.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13257#comment:6>
Sage <http://www.sagemath.org>
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