#17004: Adding height() function to Poset
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: new
Priority: minor | Milestone: sage-6.4
Component: combinatorics | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Height of a poset is defined as a length of the longest chain. It can be
done for example like this:
{{{
def height(P):
if P.cardinality() == 0:
return 0
H=P.hasse_diagram().to_undirected()
m=0
for s in H.connected_components():
m=max(H.subgraph(s).diameter(),m)
return m+1
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/17004>
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