Abstract
The size Ramsey number ř(G) of a graph G is the smallest integer ř such that there is a graph F of ř edges with the property that any two‐coloring of the edges of F yields a monochromatic copy of G. First we show that the size Ramsey number ř(Pn) of the path Pn of length n is linear in n, solving a problem of Erdös. Second we present a general upper bound on size Ramsey numbers of trees.

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