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July, 9, 2019, 2:00 PM, Dragan Doder (IRIT Toulouse)

Bat 5, Room 3/124

Title: Gradual semantics for weighted argumentation graphs

Abstract: Argumentation is a reasoning approach based on the justification of claims by arguments. It has been used for solving different Artificial Intelligence problems, including decision making, reasoning with defeasible information and classification. An argumentation framework is a directed graph, in which the nodes represent arguments, and the edges represent attacks between pairs of arguments. Gradual semantics are methods of evaluating arguments in graphs, that assign to each argument a numerical value, representing its strength. In this talk, I will present a general approach for defining gradual semantics for weighted graphs (where both arguments and attacks are weighted). I will show that most of the existing gradual semantics can be defined using the approach, and that it can be used to construct several novel semantics. The approach will be also analyzed against the set of properties from the literature.

Bio: Dragan Doder is an Associate Professor at the University of Belgrade. In November 2011, he obtained his PhD in Logic and Theoretical Computer Science at University of Belgrade, Faculty of Mathematics. Currently he is on a leave and holds a Research Fellow position at IRIT – Toulouse Institute of Computer Science Research. His research interest focuses on applications of mathematics and logic in Artificial Intelligence and Computer Science, and in particular dynamics of beliefs and intentions, planning, formal argumentation, formal systems for probabilistic and temporal reasoning, and handling inconsistency.

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