This volume covers a wide range of mathematical problems, including philosophical logic, logic in computer science, physics and philosophy of science. All articles are referenced to guarantee a high level of scientific content and presentation.

Contents: H. de Nivelle: Resolution Games and Non-Liftable Resolution Orderings. - M. Kerber, M. Kohlhase: A Tableau Calculus for Partial Functions. - G. Salzer: MUltlog: an Expert System for Multiple-valued Logics. - J. Krajicpek: A Fundamental Problem of Mathematical Logic. - P. Pudlak: On the Lengths of Proofs of Consistency. - A. Carbone: The Craig Interpolation Theorem for Schematic Systems. - I.A. Stewart: The Role of Monotonicity in Descriptive Complexity Theory. - R. Freund, L. Staiger: Numbers Defined by Turing Machines.