1. Preface

   • Michael Kaminski
   • Mirosław Truszczyński

   EditorialNotes 20 February 2009 Pages: 1 - 3

2. My work with Victor Marek: a mathematician looks at answer set programming

   • Jeffrey B. Remmel

   OriginalPaper 07 February 2009 Pages: 5 - 16

3. My six encounters with Victor Marek—a personal account

   • Mirosław Truszczyński

   OriginalPaper 21 January 2009 Pages: 17 - 20

4. Default logic generalized and simplified

   • Alexander Bochman

   OriginalPaper 27 January 2009 Pages: 21 - 49

5. Reasoning about temporal properties of rational play

   • Nils Bulling
   • Wojciech Jamroga
   • Jürgen Dix

   OriginalPaper 29 January 2009 Pages: 51 - 114

6. Exploiting conjunctive queries in description logic programs

   • Thomas Eiter
   • Giovambattista Ianni
   • Roman Schindlauer

   OriginalPaper 27 January 2009 Pages: 115 - 152

7. Justification logics, logics of knowledge, and conservativity

   • Melvin Fitting

   OriginalPaper 24 January 2009 Pages: 153 - 167

8. On the relation among answer set solvers

   • Enrico Giunchiglia
   • Nicola Leone
   • Marco Maratea

   OriginalPaper 24 January 2009 Pages: 169 - 204

9. A non-preferential semantics of non-monotonic modal logic

   • Michael Kaminski

   OriginalPaper 27 January 2009 Pages: 205 - 223

10. From Hilbert’s program to a logic tool box

    • J. A. Makowsky

    OriginalPaper 29 January 2009 Pages: 225 - 250

11. Integrating answer set programming and constraint logic programming

    • Veena S. Mellarkod
    • Michael Gelfond
    • Yuanlin Zhang

    OriginalPaper 28 February 2009 Pages: 251 - 287

12. Consistency properties and set based logic programming

    • Anil Nerode
    • Jeffrey B. Remmel

    OriginalPaper 06 March 2009 Pages: 289 - 311

13. Stable models and difference logic

    • Ilkka Niemelä

    OriginalPaper 30 January 2009 Pages: 313 - 329

14. Hyperequivalence of logic programs with respect to supported models

    • Mirosław Truszczyński
    • Stefan Woltran

    OriginalPaper 28 January 2009 Pages: 331 - 365