#1314: graphs: calculate tutte polynomial
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Reporter: jason | Owner: rlm
Type: enhancement | Status: new
Priority: major | Milestone: sage-wishlist
Component: graph theory | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by azi):
Sure here is an example.
{{{
load tutte.sage
c = 0
for G in graphs.nauty_geng("13 39:39"):
if sorted(G.degree_sequence()) !=
sorted(G.complement().degree_sequence()):
c+=1
if tutte_polynomial(G,x,y) ==
tutte_polynomial(G.complement(),x,y):
print G.graph6_string()
from time import sleep
sleep(24*60*60)
if c % 1000 == 0:
print c
}}}
The motivation of this code stems from an open problem that I am now
working on.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/1314#comment:28>
Sage <http://www.sagemath.org>
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