#16598: Useless new classes and a replacement for _check_pbd
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Reporter: ncohen | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.3
Component: combinatorial designs | Keywords:
Merged in: | Authors: Nathann Cohen
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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This branch defines:
- `GroupDivisibleDesign`
- `PairwiseBalancedDesign`
- `BalancedIncompleteBlockDesign`
- `TransversalDesign`
All these classes (which inherit from `IncidenceStructure`) make it easier
to do things like compute the `automorphism_group` of a transversal
design.
The branch also adds a function `is_group_divisible_design` in
`designs_pyx.pyx`, and an empty `is_pairwise_balanced_design` that call
it. We can thus get rid of the ugly `_check_pbd`.
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/16598>
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