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Reasoning with global assumptions in arithmetic modal logics

Kupke, Clemens and Pattinson, Dirk and Schröder, Lutz (2015) Reasoning with global assumptions in arithmetic modal logics. In: 20th International Symposium on Fundamentals of Computation Theory, 2015-08-17 - 2015-08-19.

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We establish a generic upper bound ExpTime for reasoning with global assumptions in coalgebraic modal logics. Unlike earlier results of this kind, we do not require a tractable set of tableau rules for the in- stance logics, so that the result applies to wider classes of logics. Examples are Presburger modal logic, which extends graded modal logic with linear inequalities over numbers of successors, and probabilistic modal logic with polynomial inequalities over probabilities. We establish the theoretical upper bound using a type elimination algorithm. We also provide a global caching algorithm that offers potential for practical reasoning.