#9016: make morphisms hashable
---------------------------------+------------------------------------------
Reporter: burcin | Owner: AlexGhitza
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.6
Component: categories | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers: Robert Bradshaw, Travis
Scrimshaw
Authors: Burcin Erocal | Merged in:
Dependencies: | Stopgaps:
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Comment (by robertwb):
I would argue that in general it's better to avoid having these arbitrary
values for hash tested exactly at all (unless they're meaningful, like
hash(ZZ(2)) == 2), especially when they vary for 64 and 32-bit values.
Better to test it functionally, like
{{{
sage: { phi: 'yes' }[phi]
'yes'
}}}
or even
{{{
hash(phi) == hash(phi)
True
hash(phi) == hash(rho)
False
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9016#comment:20>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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