#16277: MOLS constructions rom the Handbook of Combinatorial Designs
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Reporter: ncohen | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.2
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: Nathann Cohen | Reviewers:
Report Upstream: N/A | Work issues:
Branch: u/ncohen/16277 | Commit:
Dependencies: #16248, #16231, | d4f445b189ad16b28a436d9fd2fe82db53ebf3b1
#16269, #16058 | Stopgaps:
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Comment (by ncohen):
Yo !
> 1) Could we make it go after #16272? There is a moderately trivial
rebase to do. I think it would be easier in that direction.
Yeah, no problem I guess.
> 2) Could we also move the `TD_6_12` into the database module?
Yepyep, I will do that.
> 3) In the doctests of database, I would rather call directly the
function themselves followed by `is_transversal_design`. We have no idea
(at least me) that the corresponding design is actually returned when we
call `designs.orthogonal_array` with the good parameters. Nevertheless it
is a good test to check that the latter actually return a value for those
parameters (and to see whether or not it is the corresponding value).
'f you want ......
> 4) (semi-stupid remark) For the 6 construction of OA from Vmt, the
function is rather trivial. One way to avoid duplication is to modify the
dictionnary into `n -> (k, constructor, extra_args)`. For the Vmt the
entries would look like
> {{{
> OA_constructions = {
> ...
> 46: (6, OA_from_Vmt, (4,9,[0, 1, 3, 2, 8])),
> 50: (8, OA_from_Vmt, (6,7,[0, 1, 3, 16, 35, 26, 36])),
> ...
> }
> }}}
If we do that the OA will be built when Sage starts. Plus I would like to
thank Julian R. Abel somewhere.
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/16277#comment:8>
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