Mixed, Multi-color, and Bipartite Ramsey Numbers Involving Trees of Small Diameter

Abstract

In this paper we study Ramsey numbers for trees of diameter 3 (bistars) vs., respectively, trees of diameter 2 (stars), complete graphs, and many complete graphs. In the case of bistars vs. many complete graphs, we determine this number exactly as a function of the Ramsey number for the complete graphs. We also determine the order of growth of the bipartite k-color Ramsey number for a bistar.

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