Ramsey's Theorem in its simplest form (that is known as the Friendship Theorem) asserts that if the C(6, 2) = 15 edges of the complete graph K6 on six points are colored using two colors, there will be a monochromatic triangle (a K3 subgraph of K6 with all three edges having the same color.) More generally, Ramsey's theorem claims the existence of the Ramsey numbers Rm.
In a recent article, S. Golomb reports a result obtained by his student Herbert Taylor. As was observed by H. Taylor, the complete graphs on the number of points given by the Ramsey numbers Rm provide a sharp bound. (Rm is the smallest positive integer N such that, if a complete graph KN on N points has all its C(N, 2) edges colored in m colors, there is at least one monochromatic triangle.)