#15223: Let the `TestSuite` test that the construction of a parent returns the
parent
-------------------------------------+-------------------------------------
Reporter: SimonKing | Owner:
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.1
Component: coercion | Resolution:
Keywords: construction | Merged in:
functor, test suite, sd53 | Reviewers:
Authors: Simon King | Work issues: algebraic extension
Report Upstream: N/A | functor for residue fields
Branch: | Commit:
u/SimonKing/ticket/15223 | d0c42ff938754eb8ad52f7819671f99552d683ed
Dependencies: #15229 | Stopgaps:
-------------------------------------+-------------------------------------
Comment (by SimonKing):
Rather than killing the construction, I guess the following is a nice
behaviour:
{{{
sage: K.<z> = CyclotomicField(7)
sage: P = K.factor(17)[0][0]
sage: k = K.residue_field(P)
sage: F, R = k.construction()
sage: F
AlgebraicExtensionFunctor
sage: R
Cyclotomic Field of order 7 and degree 6
sage: F(R) is k
True
sage: F(ZZ)
Residue field of Integers modulo 17
sage: F(CyclotomicField(49))
Residue field in zeta49bar of Fractional ideal (17)
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/15223#comment:41>
Sage <http://www.sagemath.org>
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