#17042: Improvement to subsets_with_hereditary_property
-------------------------+-------------------------------------------------
Reporter: | Owner:
ncohen | Status: needs_work
Type: | Milestone: sage-6.4
enhancement | Resolution:
Priority: major | Merged in:
Component: | Reviewers:
combinatorics | Work issues:
Keywords: | Commit:
Authors: | 381cfeff4c3661aa71d46514f231f6926d0b7d40
Nathann Cohen | Stopgaps:
Report Upstream: N/A |
Branch: |
u/ncohen/17042 |
Dependencies: |
#16994 |
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Comment (by ncohen):
This being said the combinat code is better to observe the speedups `:-D`
{{{
sage: %time l1=list(subsets_with_hereditary_property(lambda S:not
any(Set(S).intersection(x).cardinality()>2 for x in l), range(21)))
CPU times: user 7.97 s, sys: 72 ms, total: 8.04 s
Wall time: 7.96 s
sage: %time l2=list(subsets_with_hereditary_property(lambda S:not
any(Set(S).intersection(x).cardinality()>2 for x in l),
range(21),max_obstruction_size=3))
CPU times: user 2.46 s, sys: 44 ms, total: 2.51 s
Wall time: 2.43 s
sage: l1==l2
True
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/17042#comment:9>
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