#16272: redesign transversal designs
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Reporter: vdelecroix | Owner: Vincent Delecroix
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.2
Component: combinatorics | Resolution:
Keywords: designs, | Merged in:
orthogona arrays | Reviewers:
Authors: Vincent Delecroix | Work issues:
Report Upstream: N/A | Commit:
Branch: public/16272 | d678326f182432584dd0aaf99308038aa70961e5
Dependencies: #15310, #16227 | Stopgaps:
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Comment (by vdelecroix):
Hello,
Here it comes!
Ok. I mainly did two things
- implement my own `projective_space_as_OA` inside
`orthogonal_arrays.py`. This might sound weird but the current
implementation of `ProjectiveSpaceDesign` is slow and scarry me (I plan to
clean it soon in a ticket).
- implement a beautiful `TD_existence` (I do not like the name, so I aks
for suggestions here):
{{{
sage: from sage.combinat.designs.orthogonal_arrays import TD_existence
sage: TD_existence(6)
TD(k,6)
exist for k in [ 2, 3]
unknown to exist for k in [ 4, 6]
not exist for k in [ 7,+infini]
}}}
I also correct some of the errors raised to get mainly `EmptySetError` and
`NotImplementedError`.
Vincent
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Ticket URL: <http://trac.sagemath.org/ticket/16272#comment:15>
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