The Logical Representation of Extensive Games
Given an extensive form "G", we associate with every choice an atomic sentence and with every information set a set of well-formed formulas (wffs) of propositional calculus. The set of such wffs is denoted by [Gamma](G). Using the so-called topological semantics for propositional calculus (which differs from the standard one based on truth tables), we show that the extensive form yields a topological model of [Gamma](G), that is, every wff in [Gamma](G), is "true in G". We also show that, within the standard truth-table semantics for propositional calculus, there is a one-to-one and onto correspondence between the set of plays of G and the set of valuations that satisfy all the wffs in [Gamma](G).
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Volume (Year): 22 (1993)
Issue (Month): 2 ()
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