The papers presented at the Symposium focused mainly on two fields of interest. First, there were papers dealing with the theoretical background of fuzzy logic and with applications of fuzzy reasoning to the problems of artificial intelligence, robotics and expert systems. Second, quite a large number of papers were devoted to fuzzy approaches to modelling of decision-making situations under uncertainty and vagueness and their applications to the evaluation of alternatives, system control and optimization. Apart from that, there were also some interesting contributions from other areas, like fuzzy classifications and the use of fuzzy approaches in quantum physics. This volume contains the most valuable and interesting papers presented at the Symposium and will be of use to all those researchers interested in fuzzy set theory and its applications.

Preface. Part I: Approximate Reasoning and Fuzzy Logic. 1. Fuzzy Logic Acquisition in Expert; A. Averkin. 2. Fuzzy Local Inference in Fuzzy Knowledge Basis; H. Bandemer. 3. Fuzzy Sets in Approximate Reasoning; D. Dubois. 4. SAK -- an Expert System Shell Based on Complete Many-Valued (Fuzzy) Logic; J. Ivánek, E. Sovjáková. 5. Fuzzy Logic with Linguistic Quantifiers in Inductive Learning; J. Kacprzyk. 6. Ontology, Semantics and Syntax of Fuzzy Logic; L. Kohout. 7. On the Logical Basis of Approximate Reasoning; V. Novák. 8. Pseudophysical Logic in Artificial Intelligence; D. Pospelov. 9. Bayesian and Possibilistic Productions Rules in Syllogistic Reasoning; M. Roubens. 10. A Fuzzy Chip for High-Speed Approximate Reasoning; T. Yamakawa. Part II: Decision-Making. 11. Clustering in Banach Spaces; J. Bezdek. 12. Triangular Norm-Based Measures and Games; E.P. Klement. 13. Multimodel Representation and Management of Uncertainty; G. Klir. 14. An Optimum Concept for Fuzzified Linear Programming Based on Exact Penalty Functions; M. Kovács. 15. Linear Dependence of Fuzzy Vectors; M. Mares. 16. On the Nature of Intransitivity in Human Preferential Judgement; K. Nakamura. 17. Vaguely Interrelated Coefficients in Linear Programming as Bicriterial Optimization Problem; J. Ramík. 18. FULP -- a PC-Supported Procedure for Solving Multicriteria Linear Programming with Fuzzy Data; H. Rommelfanger. Part III: Applications in Physics. 19. On the Structure of Fuzzy Observables; R. Mesiar, A. Kolesárová. 20. On a Fuzzy Approach to Quantum Mechanics; B. Riecan. Index.