#16534: Basic Block design methods
-------------------------------------+-------------------------------------
Reporter: brett | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: Block Design, | Reviewers:
Incidence Structure, Residual, | Work issues:
Derived, Complement, Supplement, | Commit:
Union | 13280d995c98d13fbf2b9637411d3988999453e1
Authors: Brett Stevens | Stopgaps:
Report Upstream: N/A |
Branch: u/brett/design |
Dependencies: #16553 |
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Comment (by brett):
Replying to [comment:29 ncohen]:
> Hello Brett,
>
> It seems that your branch still includes traces of a failed merge. Look
for strings like ">>>>" in the design/ files and you will find them.
I think I got them all this time.
>
> Also, I had to ask you about the two "todo" that you add: we have a
`.is_resolvable` function and all designs are already checked at
construction time. You will find the 'actual' code in `designs_pyx.pyx`,
and the calls appear in the `__init__` functions of each class.
>
An incidence structure is group divisible iff its dual is resolvable so
the is_resolvable method can be used to determine if the IS is group
divisible. The question is if we find that a IS is group divisible, what
do we want to do. Do we want to store the groups as a part fo the IS?
> Nathann
>
> P.S.: Also, something weird happened as every commit appears twice in
your branch. You will see that if you click on the 'commits' link that
appears right next to the name of your branch at the head of the ticket.
I am using
{{{
git add src/sage/combinat/designs/incidence_structures.py
git commit
git trac push 16534
}}}
should I be doing something differently?
--
Ticket URL: <http://trac.sagemath.org/ticket/16534#comment:32>
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