#16603: permanental_minor_vector, matching polynomial
-------------------------------------+-------------------------------------
Reporter: pernici | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.4
Component: linear algebra | Resolution:
Keywords: | Merged in:
Authors: Mario Pernici | Reviewers: Vincent Delecroix
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/16603 | e03f93ae3016870383b50bf2a3abea4b5234e51b
Dependencies: | Stopgaps:
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Changes (by vdelecroix):
* commit: e4359bb3d2444375eed077c72274e4f6a4ed87bc =>
e03f93ae3016870383b50bf2a3abea4b5234e51b
* branch: u/pernici/ticket/16603 => u/vdelecroix/16603
Comment:
Hello,
First of all, there is already a lot of material on this ticket. It would
be good to stop here and open tickets for new features (please put me on
cc on them).
I push a commit as I do not like the `complement` keyword that sounds like
you want the rook vector of the complement matrix. I replaced it with
`use_complement`. I know that it is different from the specification for
`BipartiteGraphs` but it fits with `IndependentSets`
{{{
sage: from sage.graphs.independent_sets import IndependentSets
sage: I = IndependentSets(graphs.GridGraph((5,5)))
sage: I.cardinality()
55447
sage: I = IndependentSets(graphs.GridGraph((5,5)), complement=True)
sage: I.cardinality()
66
}}}
Nevertheless, I kept the keyword `complement` to do the following as it is
very useful
{{{
sage: identity_matrix(6).rook_vector(complement=True)
[1, 30, 315, 1420, 2715, 1854, 265]
}}}
Vincent
----
New commits:
||[http://git.sagemath.org/sage.git/commit/?id=e03f93ae3016870383b50bf2a3abea4b5234e51b
e03f93a]||{{{trac #16603: change keywords for `rook_vector` + doc}}}||
--
Ticket URL: <http://trac.sagemath.org/ticket/16603#comment:32>
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