1,745 reputation
923
bio website
location
age 26
visits member for 4 years
seen 4 hours ago

If you have any good math exercises to share feel free to contribute them on http://exwiki.org


Nov
1
comment Paper claiming a graph isomorphism that isn't actually an isomorphism?
@Zaaier What exactly do you want to implement? Just for isomorphism testing there are many free implementations online.
Oct
28
comment Upper bound for the number of hamilton cycles in a cubic graph
@Peter I forgot to mention that in this context $c$ can as well be infinity.
Oct
27
comment Upper bound for the number of hamilton cycles in a cubic graph
Exactly. What you do know though is that the limit you mention is $\leq c$ for some $c > 0.$
Oct
27
answered Upper bound for the number of hamilton cycles in a cubic graph
Oct
20
comment Proportion of asymmetric graphs
I believe you can figure this out from the book by Godsil and Royle (algebraic graph theory) see page 24.
Oct
17
comment how should I show that list chromatic number of $K_{3,3}=3$?
Perhaps this helps? exwiki.org/mw/…
Oct
15
revised Polynomial decomposition
added 7 characters in body
Oct
15
revised Polynomial decomposition
edited tags
Oct
15
asked Polynomial decomposition
Oct
8
revised How to plot bivariate function involving modulus and floor functions?
not a graph theory question
Oct
8
suggested approved edit on How to plot bivariate function involving modulus and floor functions?
Oct
2
comment $2$-connected graphs with a line graph containing no hamilton cycle
There you go then!
Oct
2
comment $2$-connected graphs with a line graph containing no hamilton cycle
@Peter Yes it is the least example.
Oct
2
comment $2$-connected graphs with a line graph containing no hamilton cycle
Hm.. what is surely true is that if $G$ is $2$-edge connected then $L(G)$ is $2$-connected. This may give a clue for counterexamples.
Oct
2
answered $2$-connected graphs with a line graph containing no hamilton cycle
Oct
2
comment $2$-connected graphs with a line graph containing no hamilton cycle
Have you checked this paper sciencedirect.com/science/article/pii/S0893965912001036 dealing with a conjecture of Thomassen, stating that every $4$-connected line graph is hamiltonian? Its not really what you're asking for but it may offer some insight.
Sep
30
awarded  Explainer
Sep
27
comment Length of longest cycle in this graph
I suggest you check the documentation related to the graph theory module sagemath.org/doc/reference/graphs/sage/graphs/graph.html
Sep
27
comment Length of longest cycle in this graph
btw, are you trying to find small planar hypohamiltonian graphs? :)
Sep
27
comment Length of longest cycle in this graph
I am sorry, I meant a .txt file. A simple file that contains the edges in a format that is easy to parse - say dimacs format.