2013/04/30 by Thomas Brihaye, Quentin Menet
Computer Science · #cs.LO
paper · pdf · doi:10.4204/eptcs.119.5
published as EPTCS 119, 2013, pp. 21-34 · In Proceedings GandALF 2013, arXiv:1307.4162
arxiv created 2013/07/17 · arxiv updated 2013/07/18
In 2006, Varacca and Völzer proved that on finite graphs, omega-regular large sets coincide with omega-regular sets of probability 1, by using the existence of positional strategies in the related Banach-Mazur games. Motivated by this result, we try to understand relations between sets of probability 1 and various notions of simple strategies (including those introduced in a recent paper of Grädel and Lessenich). Then, we introduce a generalisation of the classical Banach-Mazur game and in particular, a probabilistic version whose goal is to characterise sets of probability 1 (as classical Banach-Mazur games characterise large sets). We obtain a determinacy result for these games, when the winning set is a countable intersection of open sets.