#19586: Add is_cayley_graph
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Reporter: jaanos | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.10
Component: graph theory | Resolution:
Keywords: Cayley graphs | Merged in:
groups | Reviewers:
Authors: Janoš Vidali | Work issues:
Report Upstream: N/A | Commit:
Branch: | 382c0f2daa019b8ba1c96462dbcdbab9ad2ee6a2
u/jaanos/add_is_cayley_graph | Stopgaps:
Dependencies: |
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Comment (by dimpase):
Replying to [comment:34 dimpase]:
> Replying to [comment:33 jaanos]:
> > Hi!
> >
> > > as a switch to `libgap` will happen sooner or later, optimising for
not reading GAP output
> > > does not seem to be that important.
> >
> > I see. But should I do anything about it at this point?
> >
> > > this ceritainly looks better, but again, I don't like the counter-
intuitive parameters of `is_cayley()` and weird sort of output (a pair)
that you currently have. In particular the latter.
> >
> > I have modelled both input and output of `is_cayley` after methods
such as `is_chordal` and `is_circulant`.
interestingly, `is_circulant` implements a naive brute-force algorithm,
and docs don't mention that there is a
[http://www.ams.org/journals/spmj/2004-15-06/S1061-0022-04-00833-7/S1061-0022-04-00833-7.pdf
polynomial-time algorithm]. (Which is also not mentioned on the wikipedia
page it refers to. Perhaps I should edit the latter...)
--
Ticket URL: <http://trac.sagemath.org/ticket/19586#comment:49>
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