An improvement of the upper bound for GKS communication game
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The GKS game was formulated by Justin Gilmer, Michal Koucky, and Michael Saks in their research of the sensitivity conjecture. Mario Szegedy invented a protocol for the game with the cost of O(n^0.4732). Then a protocol with the cost of O(n^0.4696) was obtained by DeVon Ingram who used a bipartite matching. We propose a slight improvement of Ingram's method and design a protocol with cost of O(n^0.4693).
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