#19418: skew-Hadamard matrices and related srg's
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Reporter: | Owner:
dimpase | Status: positive_review
Type: | Milestone: sage-6.10
enhancement | Resolution:
Priority: major | Merged in:
Component: | Reviewers: Nathann Cohen
combinatorics | Work issues:
Keywords: | Commit:
Authors: Dima | c50c78df2b1a236b32b42f5f3bf83d5f9d3b8015
Pasechnik | Stopgaps:
Report Upstream: N/A |
Branch: |
public/19418 |
Dependencies: |
#19309 |
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Comment (by dimpase):
Thanks! By the way, _check_database() now says for me:
{{{
...
Sage can build a (1024, 462, 206, 210), Brouwer's database cannot
Sage can build a (1024, 561, 308, 306), Brouwer's database cannot
In Andries Brouwer's database:
- 448 impossible entries
- 2950 undecided entries
- 1140 realizable entries (Sage misses 36 of them)
}}}
On the other hand the graphs above can be found in
http://www.win.tue.nl/~aeb/graphs/srg/srgtab1001-1050.html
Does it mean that Sage's copy of the DB needs an update?
OK, so should I next take out Mathon's v=45?
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Ticket URL: <http://trac.sagemath.org/ticket/19418#comment:53>
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