Epistemic Actions as Resources

Epistemic Actions as Resources
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作为资源的认知行动

DOI:
10.1093/logcom/exm015
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发表时间:
2007
影响因子:
0.7
通讯作者:
Baltag A
Baltag A
中科院分区:
计算机科学4区
文献类型:
--
作者:
Baltag A

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We provide an algebraic semantics together with a sound and complete sequent calculus for information update due to epistemic actions. This semantics is flexible enough to accommodate incomplete as well as wrong information e.g. due to secrecy and deceit, as well as nested knowledge. We give a purely algebraic treatment of the muddy children puzzle, which moreover extends to situations where the children are allowed to lie and cheat. Epistemic actions, that is, information exchanges between agents, are modeled as elements of a quantale. The quantaleacts on an underlying Q-right moduleof epistemic propositions and facts. The epistemic content is encoded by appearance maps, one pairandof (lax) morphisms for each agent, which preserve the module and quantale structure respectively. By adjunction, they give rise to epistemic modalities, capturing the agents' knowledge on propositions and actions. The module action is epistemic update and gives rise to dynamic modalities—cf. weakest precondition. This model subsumes the crucial fragment of Baltag, Moss and Solecki's dynamic epistemic logic, abstracting it in a constructive fashion while introducing resource-sensitive structure on the epistemic actions.
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