Talk:Klein graphs

Chromatic number of 7-regular graph

Hello,

Are you sure about the chromatic number 3 for the 7-regular one? MathWorld says 4. Best, --MathsPoetry (talk) 13:05, 23 March 2013 (UTC)[reply]

There are quite a number of similar errors or internal incoherences. --MathsPoetry (talk) 15:00, 23 March 2013 (UTC)[reply]

I have fixed at least some of these. Maproom (talk) 16:59, 23 March 2013 (UTC)[reply]

It looks okay to me now. --MathsPoetry (talk) 18:37, 23 March 2013 (UTC)[reply]

Two graphs in one article

I observe that the article Clebsch graph also covers two graphs in one article. They are related, one is 5-regular and the other 10-regular. The article is organised differently from this one. Maproom (talk) 17:26, 25 April 2013 (UTC)[reply]

The French article only addresses the 16 vertices Clebsch graph.

I don't know whether it is correct to call the other one "Clebsch graph" as well (I did not check the sources), but it would be worth investigating that.

Wolfram mathworld calls "confusing" the usage of "Clebsch graph" by Brower et. al. to refer to its complementary, the halved-cube graph H5.

Incidentally, it seems that we have no article on no wikipedia for the halved-cube graph...

I think that the English article on Klein graphs separates better the two Klein graphs from each other than the one on the Clebsch graphs.

In the French wikipedia, we solved this issue by doing 1 article <=> 1 graph, excepted in parametric families of graphs. --MathsPoetry (talk) 17:44, 25 April 2013 (UTC)[reply]

Redundant URLs

Before re-adding redundant URLs, please carefully study Help:Citation_Style_1#Identifiers. Nemo 16:42, 2 December 2019 (UTC)[reply]

Incorrectly marked as Cayley

Hi, according to the census of cubic graphs [1], cubic Klein graph is not Cayley. I was also unable to find any proof that the graph is Cayley (I didn't find any other source that would proof it is not Cayley though).

[1] http://mdh.graphsym.net/?filters=%5B%7B%22slug%22%3A%22number_of_vertices%22%2C%22uid%22%3A1%2C%22value%22%3A%22%3D56%22%2C%22initial%22%3Afalse%7D%5D&pre_filter=null&columns=%5B%22cvt_index%22%2C%22name%22%2C%22number_of_vertices%22%2C%22diameter%22%2C%22girth%22%2C%22is_arc_transitive%22%2C%22is_bipartite%22%2C%22is_cayley%22%2C%22is_edge_transitive%22%2C%22is_hamiltonian%22%2C%22is_spx%22%2C%22vertex_stabilizer%22%5D&page=0&per_page=20&widths=null&order=%22%22 Mitch.ondra (talk) 14:07, 9 May 2023 (UTC)[reply]