#16534: Basic Block design methods
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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 ncohen):
Hello,
> It looks to me as if your is_group_divisible_design requires the user to
hand the method the groups.
It does.
> I was thinking of building a function to determine if a deign is group
divisible without knowing what the groups might be.
Okay.
> I was slightly incorrect before. A more accurate statement would be
that the dual of a resolvable IS is an group divisible IS with the
property that the blocks are transversal.
Oh, I see. I found it weird that there could exist a way to not solve the
actual packing problem `;-)`
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/16534#comment:36>
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