1. Projective Well-orderings of the Reals

   • Andrés Eduardo Caicedo
   • Ralf Schindler

   OriginalPaper 17 June 2006 Pages: 783 - 793

2. Well-foundedness in Realizability

   • M. Hofmann
   • J. van Oosten
   • T. Streicher

   OriginalPaper 07 June 2006 Pages: 795 - 805

3. The Bachmann-Howard Structure in Terms of Σ₁-Elementarity

   • Gunnar Wilken

   OriginalPaper 15 June 2006 Pages: 807 - 829

4. Failures of SCH and Level by Level Equivalence

   • Arthur W. Apter

   OriginalPaper 03 June 2006 Pages: 831 - 838

5. On the infinite-valued Łukasiewicz logic that preserves degrees of truth

   • Josep Maria Font
   • Àngel J. Gil
   • Ventura Verdú

   OriginalPaper 15 August 2006 Pages: 839 - 868

6. Strong Enumeration Reducibilities

   • Roland Sh. Omanadze
   • Andrea Sorbi

   OriginalPaper 29 June 2006 Pages: 869 - 912