#17612: A GroupDivisibleDesign module with a couple of constructions
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Reporter: ncohen | Owner:
Type: enhancement | Status: positive_review
Priority: major | Milestone: sage-6.5
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers: Vincent Delecroix
Authors: Nathann Cohen | Work issues:
Report Upstream: N/A | Commit:
Branch: public/17612 | 2401c406c149e45e6b9700c6d69fe9abf710fc22
Dependencies: | Stopgaps:
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Changes (by vdelecroix):
* status: needs_info => positive_review
* reviewer: => Vincent Delecroix
Comment:
Replying to [comment:8 ncohen]:
> > 1) A small commit for typos in the doc.
>
> What's wrong with `k_k`, really ? `:-PPPP`
>
> > 2) `GDD(kn,{k},{n}) = TD(k,n)`, doesn't it? But `transversal_design`
is not called in `group_divisible_design`. Is there a reason?
>
> Oh, true. Well, I did not need it here. But of course we can add it.
Actually, it probably does not make much sense to have GDD ask the BIBD
constructor, as those BIBD also yield OA. And I don't think that there is
any OA that is built through a BIBD.
Indirectly, yes. They use projective planes.
> It's up to you, we can do it now or later. I don't mind either, it all
works.
>
> The reason why I wrote the GDD constructor like that is that I need
those constructions for the KTS.
>
> Actually, I'm more for getting this inside first, this way I can write
the end of the KTS code tomorrow. And perhaps another code afterward to
change that. Then again it is all correct.
Fine, everything depends whether or not you want to expose this function
in `designs.<TAB>`. If you do, then one needs to make the appropriate call
to `transversal_design`.
Vincent
--
Ticket URL: <http://trac.sagemath.org/ticket/17612#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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