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arXiv 0710.3536cs.GT
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具有任意策略集的策略博弈中的公共信念与公共宣告

Common Beliefs and Public Announcements in Strategic Games with Arbitrary Strategy Sets

Krzysztof R. Apt, Jonathan A. Zvesper

摘要:

我们提供了一个基于可能性对应的任意战略博弈的认识论分析。我们首先建立了一个通用的结果,链接真正的共同信念(和,分别,共同的知识)的球员的理性定义的“单调”属性的手段,与迭代消除的战略,不满足这些属性。它使我们能够推导出与真正的共同理性信念和严格劣势策略的迭代消除有关的习惯结果作为简单的推论。这种方法依赖于塔斯基不动点定理。我们还提供了一个公理介绍这个通用的结果。这使我们能够澄清玩家推理中假设的证明理论原则。最后,我们提供了另一种表征的迭代消除策略的基础上,一个公告的概念。它适用于“全局属性”。这两类性质都包含了可合理化和严格劣势策略的迭代消除的概念。

英文摘要:

We provide an epistemic analysis of arbitrary strategic games based on possibility correspondences. We first establish a generic result that links true common beliefs (and, respectively, common knowledge) of players' rationality defined by means of `monotonic' properties, with the iterated elimination of strategies that do not satisfy these properties. It allows us to deduce the customary results concerned with true common beliefs of rationality and iterated elimination of strictly dominated strategies as simple corollaries. This approach relies on Tarski's Fixpoint Theorem. We also provide an axiomatic presentation of this generic result. This allows us to clarify the proof-theoretic principles assumed in players' reasoning. Finally, we provide an alternative characterization of the iterated elimination of strategies based on the concept of a public announcement. It applies to `global properties'. Both classes of properties include the notions of rationalizability and the iterated elimination of strictly dominated strategies.

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