#15341: Hashing of GammaH congruence groups is broken
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Reporter: mderickx | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-5.13
Component: modular forms | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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To quote the python reference manual:
http://docs.python.org/2/reference/datamodel.html#object.__hash__
The only required property is that objects which compare equal have the
same hash value;
However:
{{{
G1=GammaH(21,[4])
G2=GammaH(21,[4,16])
print G1==G2
print hash(GammaH(21,[4,16]))
print hash(GammaH(21,[4]))
}}}
prints:
{{{
True
8309769839484863814
1170799062851396877
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/15341>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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