#19661: the srgs from Cossidente and Penttila construction of hemisystems in
H(3,q^2)
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Reporter: | Owner:
dimpase | Status: needs_review
Type: | Milestone: sage-7.0
enhancement | Resolution:
Priority: major | Merged in:
Component: graph | Reviewers:
theory | Work issues:
Keywords: | Commit:
Authors: | 7c0aac76d2b66a2d481773dae7e0e7b2177cd6be
Report Upstream: N/A | Stopgaps:
Branch: |
public/19661b |
Dependencies: |
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Comment (by dimpase):
Replying to [comment:49 ncohen]:
> Arggggggggg... Hey Dima, don't we already have it here?
>
>
http://doc.sagemath.org/html/en/reference/combinat/sage/combinat/integer_vectors_mod_permgroup.html
this is a much more general code, and it's not clear how well it will do
for our task. Because to use it we first need to pass from G acting on V,
|V|=n, to G acting on VxV and then, thinking of elements of VxV as 0-1
vectors of length n^2^, call `IntegerVectorsModPermutationGroup`,
specifying `sum=max_part=1`. I don't know the code, and if it does not
work with sparse vectors then we can forget about it, it won't fly.
--
Ticket URL: <http://trac.sagemath.org/ticket/19661#comment:50>
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