#18485: Make function to generate *all* independent sets.
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Reporter: Rudi | Owner: Rudi
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.0
Component: matroid theory | Resolution:
Keywords: | Merged in:
Authors: Rudi Pendavingh | Reviewers: Vincent Delecroix,
Report Upstream: N/A | Travis Scrimshaw
Branch: | Work issues:
u/tscrim/matroid_all_independent_sets-18485| Commit:
Dependencies: | e13d3b9824a3daff353a47830bc96aca9bce65bc
| Stopgaps:
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Changes (by tscrim):
* status: needs_work => needs_review
Comment:
Whoops, sorry about that. Fixed and you shouldn't have to do anything
special because I just reverted my bad merge.
I did some testing and found that the extra copying of the sets plus the
conversion to a frozenset was just as slow if not slower than doing the
union with the frozenset.
However I was able to optimize the method by special casing when `r` is at
the full rank. The `BetsyRoss().independent_sets()` time when from 4.8s to
1.6s and `R98().independent_sets()` went from 4.8s to 2.8s on my machine.
Thanks for the explanations Rudi.
--
Ticket URL: <http://trac.sagemath.org/ticket/18485#comment:57>
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