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Algorithms for Omega-Regular Games with Imperfect Information

Krishnendu Chatterjee ; Laurent Doyen ; Thomas A. Henzinger ; Jean-Francois Raskin.

We study observation-based strategies for two-player turn-based games on graphs with omega-regular objectives. An observation-based strategy relies on imperfect information about the history of a play, namely, on the past sequence of observations. Such games occur in the synthesis of a controller&nbsp;[&hellip;]

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Timed Parity Games: Complexity and Robustness

Krishnendu Chatterjee ; Thomas A. Henzinger ; Vinayak S. Prabhu.

We consider two-player games played in real time on game structures with clocks where the objectives of players are described using parity conditions. The games are \emph{concurrent} in that at each turn, both players independently propose a time delay and an action, and the action with the shorter&nbsp;[&hellip;]

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Qualitative Logics and Equivalences for Probabilistic Systems

Krishnendu Chatterjee ; Luca de Alfaro ; Marco Faella ; Axel Legay.

We investigate logics and equivalence relations that capture the qualitative behavior of Markov Decision Processes (MDPs). We present Qualitative Randomized CTL (QRCTL): formulas of this logic can express the fact that certain temporal properties hold over all paths, or with probability 0 or 1, but&nbsp;[&hellip;]

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