1. Many Concepts and Two Logics of Algorithmic Reduction

   • Giorgi Japaridze

   OriginalPaper 21 January 2009 Pages: 1 - 24

2. The Logic of the Ontological Square

   • Luc Schneider

   OriginalPaper 20 January 2009 Pages: 25 - 51

3. Weakly higher order cylindric algebras and finite axiomatization of the representables

   • I. Németi
   • A. Simon

   OriginalPaper 20 January 2009 Pages: 53 - 62

4. Behavioral Algebraization of Logics

   • Carlos Caleiro
   • Ricardo Gonçalves
   • Manuel Martins

   OriginalPaper 23 January 2009 Pages: 63 - 111

5. Equivalents for a Quasivariety to be Generated by a Single Structure

   • W. Dziobiak
   • A. V. Kravchenko
   • P. J. Wojciechowski

   OriginalPaper 23 January 2009 Pages: 113 - 123

6. Update to “A Survey of Abstract Algebraic Logic”

   • J. M. Font
   • R. Jansana
   • D. Pigozzi

   OriginalPaper 23 January 2009 Pages: 125 - 130

7. Predicate Logical Extensions of some Subintuitionistic Logics

   • Ernst Zimmermann

   OriginalPaper 23 January 2009 Pages: 131 - 138

8. Book Reviews

   • Roy Cook

   BookReview 23 January 2009 Pages: 139 - 144