Contemporary Mathematics 1999; 326 pp; softcover Volume: 235 ISBN10: 0821813641 ISBN13: 9780821813645 List Price: US$73 Member Price: US$58.40 Order Code: CONM/235
 This volume presents the proceedings from the Eleventh Brazilian Logic Conference on Mathematical Logic held by the Brazilian Logic Society (cosponsored by the Centre for Logic, Epistemology and the History of Science, State University of Campinas, São Paolo) in Salvador, Bahia, Brazil. The conference and the volume are dedicated to the memory of professor Mário Tourasse Teixeira, an educator and researcher who contributed to the formation of several generations of Brazilian logicians. Contributions were made from leading Brazilian logicians and their LatinAmerican and European colleagues. All papers were selected by a careful refereeing processs and were revised and updated by their authors for publication in this volume. There are three sections: Advances in Logic, Advances in Theoretical Computer Science, and Advances in Philosophical Logic. Wellknown specialists present original research on several aspects of model theory, proof theory, algebraic logic, category theory, connections between logic and computer science, and topics of philosophical logic of current interest. Topics interweave prooftheoretical, semantical, foundational, and philosophical aspects with algorithmic and algebraic views, offering lively highlevel research results. Readership Graduate students and research mathematicians interested in mathematical logic and foundations; computer scientists. Table of Contents Part I. Advances in Logic  J.Y. Béziau  The mathematical structure of logical syntax
 X. Caicedo and M. Krynicki  Quantifiers for reasonizing with imperfect information and \(\Sigma{^1_1}\)logic
 W. A. Carnielli and M. LimaMarques  Society semantics and multiplevalued logics
 J. C. Cifuentes  A topological approach to the logic underlying fuzzy subset theory
 M. E. Coniglio  Categorical logic with partial elements
 M. Dickmann and F. Miraglia  Algebraic Ktheory of fields and special groups
 A. Di Nola, G. Georgescu, and S. Sessa  Closed ideals of \(MV\)algebras
 K. Došen  Definitions of adjunction
 N. G. Martínez  A reduced spectrum for \(MV\)algebras
Part II. Advances in Theoretical Computer Science  A. Avellone, M. Ferrari, P. Miglioli, and U. Moscato  A tableau calculus for Dummett predicate logic
 J. M. Turull Torres  A hierarchy of unbounded almost rigid classes of finite structures
 P. A. S. Veloso  Some connections between logic and computer science
Part III. Advances in Philosophical Logic  D. Krause and S. French  Opaque predicates, veiled sets and their logic
 O. Bueno  Truth, quasitruth and paraconsistency
 G. E. Rosado Haddock  To be a Fregean or to be a Husserlian: That is the question for Platonists
 C. Pizzi  A modal framework for consequential implication and the factor law
