Agent-time epistemics and coordination

Ido Ben-Zvi, Yoram Moses

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A minor change to the standard epistemic logical language, replacing K i with K ⌠where t is an explicit time instance, gives rise to a generalized and more expressive form of knowledge and common knowledge operators. We investigate the communication structures that are necessary for such generalized epistemic states to arise, and the inter-agent coordination tasks that require such knowledge. Previous work has established a relation between linear event ordering and nested knowledge, and between simultaneous event occurrences and common knowledge. In the new, extended, formalism, epistemic necessity is decoupled from temporal necessity. Nested knowledge and event ordering are shown to be related even when the nesting order of the operators does not match the temporal order of occurrence. The generalized form of common knowledge does not correspond to simultaneity. Rather, it corresponds to a notion of tight coordination, of which simultaneity is an instance.

Original languageEnglish
Title of host publicationLogic and Its Applications - 5th Indian Conference, ICLA 2013, Proceedings
Number of pages12
StatePublished - 2013
Event5th Indian Conference on Logic and Its Applications, ICLA 2013 - Chennai, India
Duration: 10 Jan 201312 Jan 2013

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume7750 LNCS


Conference5th Indian Conference on Logic and Its Applications, ICLA 2013

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Computer Science(all)


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