#16237: IncidenceStructureFromMatrix bug
-------------------------+-------------------------------------------------
Reporter: knsam | Owner:
Type: | Status: needs_review
defect | Milestone: sage-6.2
Priority: major | Resolution:
Component: | Merged in:
combinatorics | Reviewers:
Keywords: | Work issues:
Authors: | Commit:
Kannappan Sampath | 44b777a634ee082e1e6f1970d89eac4a2ee67e89
Report Upstream: N/A | Stopgaps:
Branch: |
u/knsam/16237 |
Dependencies: |
-------------------------+-------------------------------------------------
Comment (by knsam):
Indeed, the bug that motivated my search is now fixed; with the patch, we
have:
{{{
sage: D = designs.HadamardDesign(11); N = D.incidence_matrix()
sage: J = matrix(ZZ, 11, 11, [1]*11*11); N*J
[5 5 5 5 5 5 5 5 5 5 5]
[5 5 5 5 5 5 5 5 5 5 5]
[5 5 5 5 5 5 5 5 5 5 5]
[5 5 5 5 5 5 5 5 5 5 5]
[5 5 5 5 5 5 5 5 5 5 5]
[5 5 5 5 5 5 5 5 5 5 5]
[5 5 5 5 5 5 5 5 5 5 5]
[5 5 5 5 5 5 5 5 5 5 5]
[5 5 5 5 5 5 5 5 5 5 5]
[5 5 5 5 5 5 5 5 5 5 5]
[5 5 5 5 5 5 5 5 5 5 5]
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/16237#comment:12>
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