#11869: Horrible bug in number field conversion
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Reporter: jdemeyer | Owner: davidloeffler
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.7.2
Component: number fields | Keywords: coercion
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies: #11873
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Changes (by mstreng):
* status: needs_review => needs_work
Comment:
{{{
sage: K.<a> = NumberField(x^2-5)
sage: L, phi = K.subfield(-a)
sage: phi(L.gen())
-a
sage: K(L.gen())
a
}}}
Of course the second one must equal the first one or raise an error.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11869#comment:10>
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