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arXiv · 1805.06881

Changing Observations in Epistemic Temporal Logic

Aurèle Barrière·Bastien Maubert·Aniello Murano·Sasha Rubin
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Abstract

We study dynamic changes of agents' observational power in logics of knowledge and time. We consider CTL*K, the extension of CTL* with knowledge operators, and enrich it with a new operator that models a change in an agent's way of observing the system. We extend the classic semantics of knowledge for perfect-recall agents to account for changes of observation, and we show that this new operator strictly increases the expressivity of CTL*K. We reduce the model-checking problem for our logic to that for CTL*K, which is known to be decidable. This provides a solution to the model-checking problem for our logic, but its complexity is not optimal. Indeed we provide a direct decision procedure with better complexity.

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Aurèle Barrière, Bastien Maubert, Aniello Murano, Sasha Rubin. 2018-09-03. Changing Observations in Epistemic Temporal Logic. https://arxiv.org/abs/1805.06881

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