For any rational , there is a subgraph of the odd-distance graph with
[1] Pan Zhi-Shi, Roussel Nicolas, Subgraphs of the odd-distance graph with given circular chromatic number, manuscript
NR.
Subgraph construction
For any rational
, there is a subgraph
of the odd-distance graph with ![$ \chi_c(H_r)=r $](/files/tex/88b43ddcf1eca48aee36292e8b6f8ff9fffd0621.png)
[1] Pan Zhi-Shi, Roussel Nicolas, Subgraphs of the odd-distance graph with given circular chromatic number, manuscript
NR.