The Adaptive Logic of Compatibility*
On Modal Logics Characterized by Models with Relative Accessibility Relations
An O(n log n)-Space Decision Procedure for the Relevance Logic B+
Intuitionistic Propositional Logic without ‘Contraction’ but with ‘Reductio’*
Logic, Action and Cognition
Displaying Modal Logic
Set Theory
Logic, Logic, and Logic
Wittgenstein, Finitism, and the Foundations of Mathematics
Moral Calculations
Language, Logic and Formalization of Knowledge
Fibring Logics
Computational Logic
Mathematics of Fuzzy Sets
Sets, Logic and Categories
Contents of Volume 66