#16500: New recursive constructions of Orthogonal Arrays
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Reporter: ncohen | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.3
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers:
Authors: Nathann Cohen | Work issues:
Report Upstream: N/A | Commit:
Branch: u/ncohen/16500 | 770a28da24236a2b13f905eab3d827e0fbfe34d8
Dependencies: #16499 | Stopgaps:
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Comment (by ncohen):
Yo !
I updated the "find" functions a bit. Nothing smart, just common sense,
and the `MOLS_table` function is fast again. Yeepeeeeeeeeee !!! `:-P`
> - It would be nice to have references! You provide `[AC07]_` for
`construction_3_4` but that's all.
Ahahahah. I had nothing else `:-P`
I tried to reverse-engineer the construction from the theorem's claim, and
when I was not able too I asked Julian R. Abel for a hint. This being
said, the explanations I give in the docstring are more or less like a
proof.
> - Why you did not move `product`, `one_truncated_group` and
`two_trucated_group` in the recursive construction?
Because I thought that it would be abusing your kindness. I waste my
health implementing those things, but I still try to makes patches somehow
readable so that reviewing them will not be hell for you. I can add a
commit for that if you don't mind. As I told you by email, "this is in the
plan" `:-P`
> - Why not put the cache only for `find_recursive_construction`? (less
cached function and less function calls)
Because this function returns both OA and !True/False answers. The
`find_*` functions I cached only return immutable stuff.
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/16500#comment:10>
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