#16934: Finite fields coercion bug
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Reporter: jdemeyer | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.4
Component: coercion | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by pbruin):
The construction of the non-identical `k1` and `k2` appears to be due to a
subtlety involving the `FiniteFieldFactory.other_keys()` method and an
intermediate construction of another finite field (defined by the same
data but with `impl=None`) during the construction of a common parent for
the computation of `a/2`. The keys returned by `other_keys()` only differ
in the `impl` keyword. I think the best solution is to always set the
`impl` keyword when constructing the key (as opposed to allowing it to be
`None`). Then the use of this `other_keys()` method, which feels to me
somewhat like a hack, can be avoided.
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Ticket URL: <http://trac.sagemath.org/ticket/16934#comment:16>
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