#16553: Clean IncidenceStructure
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-6.3
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers:
Authors: Nathann Cohen, | Work issues:
Vincent Delecroix | Commit:
Report Upstream: N/A | a5c4dbc9d1b77315d90dd3dd7a8ccea780f59ecf
Branch: public/16553 | Stopgaps:
Dependencies: |
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Comment (by vdelecroix):
Another question: why steiner triple systems are incidence structure but
quadruple ones are tuples of tuples? It is ugly in the doctest
{{{
sage: S3_9 = designs.steiner_triple_system(9)
sage: S3_9.is_t_design(return_parameters=True)
(True, [2, 9, 3, 1])
sage: blocks = designs.steiner_quadruple_system(8)
sage: S8 = designs.IncidenceStructure(8, blocks)
sage: S8.is_t_design(return_parameters=True)
(True, [3, 8, 4, 1])
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/16553#comment:20>
Sage <http://www.sagemath.org>
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