#20963: __invert__ for Laurent polynomial is wrong
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Reporter: vdelecroix | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.3
Component: algebra | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by vdelecroix):
Replying to [comment:3 tscrim]:
> It is ''really'' annoying to not be able to do `1 / x` and stay within
Laurent polynomials as there is a lot more functionality available than in
the fraction field. So -1 on always returning an element in the fraction
field (in this case).
Modifying the coercion model is out of the scope of this ticket ;-) What
about `1 / 1`? The result should stay in whatever ring `1` belongs to? The
advantage of the coercion model approach is that there is no ambiguity.
I agree that we should be able to invert `x` inside the Laurent
polynomials (hence my post on sage-devel mentioned in [comment:2
comment:2]). But I don't agree that the syntax should be `1 / x`.
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Ticket URL: <https://trac.sagemath.org/ticket/20963#comment:4>
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