A (729,336,153,156)-strongly regular graph

[ncohen]

As the title says.

[ncohen]

New commits:

​361c181

trac #19311: A (729,336,153,156)-strongly regular graph

[dimpase]

hmm, shouldn't we have a generic function to build a graph from a 2-intersection code? (you basically have it in the body already...)

[ncohen]

hmm, shouldn't we have a generic function to build a graph from a 2-intersection code? (you basically have it in the body already...)

We can have one if you feel like adding it. What I fear the most is writing the doc, personally... e.g. define it properly.

So as it is only used once for the moment.

Nathann

[dimpase]

I really would want a properly documented generic function. As you just wrote this code, you know what it does, and I don't. I'd help with improving the doc, no problem...

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​1a435b6

trac #19311: Draft of an individual function

[ncohen]

Here are my last 30 minutes, just because you requested it.

Since you wanted an independent function, there are holes that you can help fill: the matrix is currentl a matrix of homogeneous coordinates but the zeroes must not be anywhere (if I remember correctly), and that needs to be explained properly. There is also an obvious need of a doctest.

Feel free to change the function's arguments if you do not want a matrix but something else instead.

Nathann

[dimpase]

please have a look at the public/19311 trac git branch. The last commit is the fix/docs etc. If you are happy with it please make it into positive reviewed one.

[git]

Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:

​be0c14d	trac #19311: A (729,336,153,156)-strongly regular graph
​59b3692	trac #19311: Draft of an individual function
​85e1bc1	docs and example and optimisation/simplification

[ncohen]

please have a look at the public/19311 trac git branch. The last commit is the fix/docs etc. If you are happy with it please make it into positive reviewed one.

WOUHUUUUUUUUUUUUUUUUUUUUUUUU ! You finally learnt the workflow !! :-PPPPPP

Good to go. Thanks for that ;-)

Nathann

P.S.: Could you pease fill your name in th.... What the hell!!??? Really??? :-D

[dimpase]

for the record, GQs of type T_2*(O) are a case of this construction (for O a 0-2 intersection set in PG(2,q)). This ought to be unified, eventually.