#14532: Symplectic graphs
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Reporter: ncohen | Owner: jason, ncohen, rlm
Type: enhancement | Status: closed
Priority: major | Milestone: sage-5.10
Component: graph theory | Resolution: fixed
Keywords: strongly regular graphs | Work issues:
Report Upstream: N/A | Reviewers: Frédéric Chapoton
Authors: Nathann Cohen | Merged in: sage-5.10.beta4
Dependencies: #14217 | Stopgaps:
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Comment (by ncohen):
Helloooooooo !
> maybe Sage should have "polar space" graphs in general, not, only
symplectic ones?
Well, yes it would be nice indeed, but I do not know how to build them. I
guess that it only takes 5~6 lines, like for the symplectic ones, but I
don't know which ones. Actually, I have no idea on earth what these graphs
are, except what I could read (and understand, which is even less) from
Brouwer's website.
http://www.win.tue.nl/~aeb/graphs/srg/srgtab.html
I believe I created what he calls a `VO^-` graph
(`graphs.BrouwerHaemersGraph`), and the same code worked for different
parameters but I was not able to make it work in characteristic two, and
so I did not write this more general patch.
If you know how to make it work, I would be glad to see it in Sage too
`:-P`
Nathann
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14532#comment:18>
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