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2022 | OriginalPaper | Buchkapitel

Epistemic Logic Programs: A Study of Some Properties

verfasst von : Stefania Costantini, Andrea Formisano

Erschienen in: Logic Programming and Nonmonotonic Reasoning

Verlag: Springer International Publishing

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Abstract

Epistemic Logic Programs (ELPs), extend Answer Set Programming (ASP) with epistemic operators. The semantics of such programs is provided in terms of world views, which are sets of belief sets. Different semantic approaches propose different characterizations of world views. Recent work has introduced semantic properties that should be met by any semantics for ELPs, like the Epistemic Splitting Property, that, if satisfied, allows to modularly compute world views in a bottom-up fashion, analogously to ‘traditional’ ASP. We analyze the possibility to change the perspective, shifting from a bottom-up to a top-down approach to splitting. Our new definition: (i) copes with concerns regarding unfoundedness of world views and subjective constraint monotonicity; (ii) is provably applicable to many of the existing semantics; (iii) operates similarly to “traditional” ASP; (iv) provably coincides with the bottom-up notion of splitting at least on the class of Epistemically Stratified Programs (which are, intuitively, those where the use of epistemic operators is stratified).

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Fußnoten
1
Nesting of subjective literals is not considered here.
 
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Metadaten
Titel
Epistemic Logic Programs: A Study of Some Properties
verfasst von
Stefania Costantini
Andrea Formisano
Copyright-Jahr
2022
DOI
https://doi.org/10.1007/978-3-031-15707-3_11

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