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Modeling knowledge dynamics in multi-agent systems based on informants

Published online by Cambridge University Press:  22 February 2012

Luciano H. Tamargo ,
Alejandro J. García ,
Marcelo A. Falappa  and
Guillermo R. Simari
Luciano H. Tamargo*
Affiliation:
Department of Computer Science and Engineering, Artificial Intelligence Research and Development Laboratory, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina
Alejandro J. García*
Affiliation:
Department of Computer Science and Engineering, Artificial Intelligence Research and Development Laboratory, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina
Marcelo A. Falappa*
Affiliation:
Department of Computer Science and Engineering, Artificial Intelligence Research and Development Laboratory, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina
Guillermo R. Simari*
Affiliation:
Department of Computer Science and Engineering, Artificial Intelligence Research and Development Laboratory, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina
*
e-mails: lt@cs.uns.edu.ar, ajg@cs.uns.edu.ar, mfalappa@cs.uns.edu.ar, grs@cs.uns.edu.ar
e-mails: lt@cs.uns.edu.ar, ajg@cs.uns.edu.ar, mfalappa@cs.uns.edu.ar, grs@cs.uns.edu.ar
e-mails: lt@cs.uns.edu.ar, ajg@cs.uns.edu.ar, mfalappa@cs.uns.edu.ar, grs@cs.uns.edu.ar
e-mails: lt@cs.uns.edu.ar, ajg@cs.uns.edu.ar, mfalappa@cs.uns.edu.ar, grs@cs.uns.edu.ar
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Abstract

In this paper, we model knowledge dynamics in agents’ belief bases in a collaborative multi-agent system (MAS). Four change operators are introduced: expansion, contraction, prioritized revision, and non-prioritized revision. For all of them, both constructive definitions and an axiomatic characterization by representation theorems are given. We formally justify minimal change, consistency maintenance, and non-prioritization principles. These operators are based on an epistemic model for multi-source belief revision in which a rational way to weigh the beliefs using a credibility order among agents is developed. The defined operators can be seen as skills added to the agents improving the collective reasoning of a MAS.

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Type
Articles
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The Knowledge Engineering Review , Volume 27 , Issue 1 , 22 February 2012 , pp. 87 - 114
Copyright
Copyright © Cambridge University Press 2012

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