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Computation of Ramsey Numbers \( R(C_m, W_n) \)

Liang Luo1, Meilian Liang2, Zhenchong Li3
1School of Transportation, Wuhan University of Technology. Wuhan, 430063, China
2School of Mathematics and Information Science, Guangxi University, Nanning, 530004,China
3Guangxi Academy of Sciences Nanning, 530007, China

Abstract

For given finite simple graphs \( F \) and \( G \), the Ramsey number \( R(F, G) \) is the minimum positive integer \( n \) such that for every graph \( H \) of order \( n \), either \( H \) contains \( F \) or the complement of \( H \) contains \( G \). In this note, with the help of computer, we get that
\[
R(C_5, W_6) = 13, \quad R(C_5, W_7) = 15, \quad R(C_5, W_8) = 17,
\]
\[
R(C_6, W_6) = 11, \quad R(C_6, W_7) = 16, \quad R(C_6, W_8) = 13,
\]
\[
R(C_7, W_6) = 13 \quad \text{and} \quad R(C_7, W_8) = 17.
\]