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Van der waerden and ramsey type games
Authors:József Beck
Institution:(1) Mathematical Institute of the Hungarian Academy of Sciences, H-1053 Budapest, Hungary
Abstract:Let us consider the following 2-player game, calledvan der Waerden game. The players alternately pick previously unpicked integers of the interval {1, 2, ...,N}. The first player wins if he has selected all members of ann-term arithmetic progression. LetW*(n) be the least integerN so that the first player has a winning strategy. By theRamsey game on k-tuples we shall mean a 2-player game where the players alternately pick previously unpicked elements of the completek-uniform hypergraph ofN verticesK N k , and the first player wins if he has selected allk-tuples of ann-set. LetR k*(n) be the least integerN so that the first player has a winning strategy. We prove (W* (n))1/n → 2,R 2*(n)<(2+ε) n andR k * n<2 nk / k! fork ≧3.
Keywords:05 A 05
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