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L’IRIT étant localisé sur plusieurs sites, ses séminaires sont organisés et ont lieu soit à l’Université Toulouse 3 Paul Sabatier (UT3), l’Université Toulouse 1 Capitole (UT1), l’INP-ENSEEIHT ou l’Université Toulouse 2 Jean Jaurès (UT2J).


The (Parameterized) Complexity of (Positional) Games

Abdallah SAFFIDINE - The University of New South Wales (Australie)

Jeudi 2 Mars 2017, 14h00 - 15h30
IRIT, Salle 175
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Classical Computational Complexity is a popular tool from Theoretical Computer Science used to characterize the difficulty of solving decision problems. I will present how a couple intuitive criteria allow one to guess the most likely complexity class of games of various sort. We'll then move to Parameterized Complexity which addresses some of the practical shortcomings of classical computational complexity and has seen increased adoption for studying graph-theoretic problems. I will describe ongoing work on building a better understanding of the Parameterized Complexity of Games. As an application, we'll show that Short Generalized Hex is W[1]-complete parameterized by the number of moves. This disproves a conjecture from Downey and Fellows' influential list of open problems from 1999.