Comparing semantics for temporal STIT logic

Roberto Ciuni, Emiliano Lorini


In this paper we establish equivalence results for the different semantics for the temporal STIT logic T-STIT, that includes temporal operators and the group agency operator for the grand coalition, and we study a semantics for temporal STIT that is based on the concept of interpreted system a` la Fagin et al. We discuss the descriptive adequacy of the above semantics in capturing a given game-theoretical scenario where information about the players is included, and we compare them with traditional BT+AC semantics. Also, we discuss the extension of T-STIT with full groups and the corresponding operators, and we discuss the distinction between frames that impose additivity and superadditivity on the choices of arbitrary groups.

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