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A pair of universal sequence-set betting strategies (1210.5968v9)
Published 22 Oct 2012 in cs.DS and cs.CC
Abstract: We introduce the sequence-set betting game, a generalization of An. A. Muchnik's non-monotonic betting game. Instead of successively partitioning the infinite binary strings by their value of a bit at a chosen position, as in the non-monotonic game, the player is allowed to partition the strings into any two clopen sets with equal measure. We show that, while there is no single computable sequence-set betting strategy that predicts all non-Martin-L\"of random strings, we can construct two strategies such that every non-Martin-L\"of random string is predicted by at least one of them.