#16892: Function to check if a poset containt a subposet isomorphic to another
poset
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-wishlist
Component: combinatorics | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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It is, in principle, easy to check if poset A contains a subposet
isomorphic to poset B:
{{{
def has_isomorphic_subposet(A, B):
for x in Subsets(A.list()):
if A.subposet(x).is_isomorphic(B):
return True
return False
}}}
In reality this is way too slow. Can this be made usefully fast at least
in posets of size 5..10?
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Ticket URL: <http://trac.sagemath.org/ticket/16892>
Sage <http://www.sagemath.org>
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