1. Cn-Definitions of Propositional Connectives

   • Witold A. Pogorzelski
   • Piotr Wojtylak

   OriginalPaper Pages: 1 - 26

2. Computably Enumerable Equivalence Relations

   • Su Gao
   • Peter Gerdes

   OriginalPaper Pages: 27 - 59

3. Model Existence in Non-Compact Modal Logic

   • Yoshihito Tanaka

   OriginalPaper Pages: 61 - 73

4. Principal Congruences on Semi-De Morgan Algebras

   • Cândida Palma
   • Raquel Santos

   OriginalPaper Pages: 75 - 88

5. Glivenko Type Theorems for Intuitionistic Modal Logics

   • Guram Bezhanishvili

   OriginalPaper Pages: 89 - 109

6. Book Reviews

   BookReview Pages: 111 - 150