#19922: coercion between real and complex interval fields
-------------------------------------+-------------------------------------
Reporter: vdelecroix | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-7.1
Component: coercion | Resolution:
Keywords: | Merged in:
Authors: Vincent Delecroix | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/19922 | d08f25031368716fae3780b41f2f77bea69179f6
Dependencies: | Stopgaps:
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Comment (by dkrenn):
Replying to [comment:1 vdelecroix]:
> Though the following still fails
> {{{
> sage: R = ComplexIntervalField(128)['x']
> sage: R.gen() * RIF.one()
> }}}
> where I would expect an answer in `CIF['x']`.
This comes from
{{{
sage: RIF.construction()
(Completion[+Infinity], Rational Field)
sage: CIF.construction() is None
True
}}}
In contrast to
{{{
sage: CC.construction()
(AlgebraicClosureFunctor, Real Field with 53 bits of precision)
sage: RR.construction()
(Completion[+Infinity], Rational Field)
}}}
So implementing the construction for `ComplexIntervalField` should (I hope
so at least) also fix the original problem, since then there is a common
starting point for the pushout (namely `QQ`) and the two
`CompletionFunctor` and the `AlgebraicClosureFunctor` can be applied on
it.
--
Ticket URL: <http://trac.sagemath.org/ticket/19922#comment:2>
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