The size, multipartite Ramsey numbers for nK2 versus path-path and cycle

preprint2021arXivOpen access

Abstract

For given graphs G1,G2,…,GnG_1, G_2,\ldots, G_n and any integer jj, the size of the multipartite Ramsey number mj(G1,G2,…,Gn)m_j(G_1, G_2,\ldots, G_n) is the smallest positive integer tt such that any nn-coloring of the edges of Kj×tK_{j\times t} contains a monochromatic copy of GiG_i in color ii for some ii, 1≤i≤n1 \leq i \leq n, where Kj×tK_{j\times t} denotes the complete multipartite graph having jj classes with tt vertices per each class. In this paper we compute the size of the multipartite Ramsey number mj(K1,2,P4,nK2)m_j(K_{1,2}, P_4, nK_2) for any j,n≥2j,n\geq 2 and mj(nK2,C7)m_j(nK_2,C_7), for any j≤4j\leq4 and n≥2n\geq 2.

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