CONTRIBUTORS Carlos Areces INRIA Lorraine, 615 rue du Jardin Botanique, 54602 Villers l`es Nancy Cedex, France.
[email protected] Sergei Artemov Computer Science, Graduate Center CUNY, 365 Fifth Avenue, New York, NY 10016, USA.
[email protected] Franz Baader TU Dresden, Department of Computer Science, Institute for Theoretical Computer Science, 01062 Dresden, Germany.
[email protected] Johan van Benthem Institute for Logic, Language & Computation, (ILLC), University of Amsterdam, Plantage Muidergracht 24, 1018 TV Amsterdam, The Netherlands; and Department of Philosophy, Stanford University, Stanford, CA 94305, USA.
[email protected] Patrick Blackburn INRIA Lorraine, 615 rue du Jardin Botanique, 54602 Villers l`es Nancy Cedex, France.
[email protected] Julian Bradfield Computer Science, King’s Buildings, Mayfield Road, Edinburgh EH9 3JZ, UK.
[email protected] Torben Bra¨ uner Department of Computer Science, Roskilde University, PO Box 260, DK-4000 Roskilde, Denmark.
[email protected] Balder ten Cate ISLA - Informatics Institute, University of Amsterdam, Kruislaan 403, 1098SJ, Amsterdam, The Netherlands.
[email protected] Melvin Fitting Department of Mathematics and Computer Science, Lehman College, 250 Bedford Park Blvd. West, Bronx, NY 10468-1589, USA. melvin.fi
[email protected] viii Contributors Silvio Ghilardi Department of Computer Science, Universit` a degli Studi di Milano, via Comelico 39, 20135 Milano, Italy.
[email protected] Valentin Goranko School of Mathematics, University of the Witwatersrand, Private Bag 3, WITS 2050, Johannesburg, South Africa.