Knowledge Representation, Nonmonotonic Reasoning, Belief Revision, Computational Complexity, Reasoning about actions, Planning.
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I have been in the program committe of ECSQARU-2001, KR-2002, NMR-2002, ECSQARU-2003, and KR-2004. I was co-chair, with Thierry Vidal, of STAIRS-2002. I was an associate editor of JAIR (Journal of Artificial Intelligence Research).