1. Universality of the closure space of filters in the algebra of all subsets

   • Andrzej W. Jankowski

   OriginalPaper Pages: 1 - 9

2. Disjunctions in closure spaces

   • Andrzej W. Jankowski

   OriginalPaper Pages: 11 - 24

3. The Skolem-Löwenheim theorem in toposes. II

   • Marek Zawadowski

   OriginalPaper Pages: 25 - 38

4. Models for stronger normal intuitionistic modal logics

   • Kosta Došen

   OriginalPaper Pages: 39 - 70

5. A semantical investigation into Leśniewski's axiom of his ontology

   • Mitio Takano

   OriginalPaper Pages: 71 - 77

6. An application of Rieger-Nishimura formulas to the intuitionistic modal logics

   • Dimiter Vakarelov

   OriginalPaper Pages: 79 - 85

7. Decision problems for classes of diagonalizable algebras

   • Aldo Ursini

   OriginalPaper Pages: 87 - 89

8. Logic of nondeterministic information

   • Ewa Orłowska

   OriginalPaper Pages: 91 - 100

9. Books received

   • Janusz Czelakowski

   BookReview Pages: 101 - 105