#16530: Caching error for function field extensions
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Reporter: saraedum | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.3
Component: commutative algebra | Resolution:
Keywords: sd59, function fields | Merged in:
Authors: Julian Rueth | Reviewers:
Report Upstream: N/A | Work issues:
Branch: u/saraedum/ticket/16530 | Commit:
Dependencies: | Stopgaps:
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Changes (by saraedum):
* status: new => needs_review
Old description:
> Currently, we have the following behaviour
> {{{
> sage: K.<x> = FunctionField(QQ)
> sage: R.<y> = K[]
> sage: L.<y> = K.extension(y^2-x)
> sage: R.<z> = L[]
> sage: M.<z> = L.extension(z-1)
> sage: R.<z> = K[]
> sage: N.<z> = K.extension(z-1)
> sage: N is M
> True
> }}}
New description:
Currently, we have the following behaviour
{{{
sage: K.<x> = FunctionField(QQ)
sage: R.<y> = K[]
sage: L.<y> = K.extension(y^2-x)
sage: R.<z> = L[]
sage: M.<z> = L.extension(z-1)
sage: R.<z> = K[]
sage: N.<z> = K.extension(z-1)
sage: N is M
True
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/16530#comment:2>
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