2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74256Two new bounds for multicolor Ramsey numbers are proved: $R(K_3,K_3,C_4,C_4)\geq 27$ and $R_4(C_4)\leq 19$.4 pages, 2 figuresCombinatorics05c55Two multicolor Ramsey numberstext