#19353: A (729, 448, 277, 272)-strongly regular graph
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Reporter: | Owner:
ncohen | Status: positive_review
Type: | Milestone: sage-6.9
enhancement | Resolution:
Priority: major | Merged in:
Component: graph | Reviewers:
theory | Work issues:
Keywords: | Commit:
Authors: | d5f10f7e308bf0fdbe9cfd2b7cc39eab6ace8eb4
Nathann Cohen | Stopgaps:
Report Upstream: N/A |
Branch: |
u/ncohen/19353 |
Dependencies: |
#19335 |
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Comment (by dimpase):
Replying to [comment:3 ncohen]:
> > OK, the last, I hope. How about (729 336 153 156 ), though? Sage
says
> > `...Penttila & Royle: projective 9-ary [42,3] code with weights 36,
39`
>
> Isn't that #19311?
isn't #19311 about something different -- two-intersection code(s)?
>
> > I'm about to start complaining that all these 2-weight codes should go
to where they belong to, and we just get them from `sage.codes.whatever`.
>
> And you would be right to. It takes a lifetime to compile this cython
module, and most of it has no reason to be cython code. Would you feel
like writing this two-code module in sage.coding? It is clear that it
belongs there, but given that I still do not totally understand all the
meaning of all parameters in a "projective 9-ary [42,3] code with weights
36, 39", I do not feel much at ease implementing and documenting all
that...
I recall having a long tread, either in email, or in some google groups,
or on trac, where I explained (to myself mostly) the stuff on projective
codes. I can't seem to locate it. Did I just dream about it? Or perhaps
you know where to find this?
--
Ticket URL: <http://trac.sagemath.org/ticket/19353#comment:4>
Sage <http://www.sagemath.org>
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