#18462: cayley_graph of finitely presented group
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Reporter: kalvotom | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.8
Component: group theory | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by ncohen):
> One way to fix this in `cayley_graph` would be to simplify/reduce the
products of group elements before adding them to the graph.
That would be a way to fix your code, but if we did that we would
knowingly *not* fix the real bug, i.e. the hashing problem. The code of
`cayley_graph` does nto seem wrong to me: the problem is with the group
elements which do not respect a standard.
You should write to sage-devel about this: not about the `cayley_graph`
problem, but about the hashing problem. "Two equal elements should always
have the same hash", and this is not satisfied here.
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/18462#comment:5>
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