#19499: Mathon's graphs on 784 vertices
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Reporter: dimpase | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.10
Component: graph theory | Resolution:
Keywords: | Merged in:
Authors: Dima Pasechnik | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/dimpase/mathon784 | 6c7e85187a0d695ef3856b83d08eaaa0520f1fc0
Dependencies: | Stopgaps:
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Comment (by dimpase):
Replying to [comment:2 ncohen]:
> Though I can't really say why, the doctests do not pass because of some
syntax error.
as pointed out in comment #4, extra `sage:` in doctests... fixed in the
latest commit.
>
> Also, I don't get why you put in graphs/generators/classical_geometries
a function that returns matrices, and in strongly_regular_db.pyx the
function that returns the graph.
the latter returns an s.r.g., and we have such functions in
strongly_regular_db.pyx, no?
The former, hmm - well, it's a combinatorial object that can be described
as an edge-coloured complete graph.
I can move it to combinat/matrices, but where? Or I can make it an edge-
coloured graph. Both of these ways will need an extra code to get out the
matrices then.
Anyhow, tell me what you like more (but don't ask me to start a new module
for association schemes, not yet :-))
>
> Is there a reason to not merge mathon_pseudocylcic_merging_graph and
mathon_graph_on_784_vertices?
one is more general than the other, you can build other graphs using the
former,
given the right input.
>
> I noted a 'preseerved' somewhere, and nothing else seems odd `:-)`
fixed, too.
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New commits:
||[http://git.sagemath.org/sage.git/commit/?id=6c7e85187a0d695ef3856b83d08eaaa0520f1fc0
6c7e851]||{{{typos fixed}}}||
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Ticket URL: <http://trac.sagemath.org/ticket/19499#comment:6>
Sage <http://www.sagemath.org>
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