#17427: x==y while hash(x)!=hash(y) with SchemeMorphism_point_projective_field
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Reporter: ncohen | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.5
Component: PLEASE CHANGE | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by nbruin):
Replying to [comment:7 bhutz]:
> I'd have to experiment a little with that set-up to see if it causes any
additional issues. For example the points defined over the ring and the
fraction field with the same coordinates would then hash to the same
value. At the moment those points would be != since there is not yet a
coercion model for projective points and morphisms.
Equality of hash values is never a correctness problem, only a source of
performance problems. The constant function would be a legitimate hash
function.
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Ticket URL: <http://trac.sagemath.org/ticket/17427#comment:8>
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