Front matter -- Preface / Berger, Ulrich / Diener, Hannes / Schuster, Peter / Seisenberger, Monika -- Contents -- Contributors -- A New Use of Friedman's Translation: Interactive Realizability / Aschieri, Federico / Berardi, Stefano -- Polymorphic Logic / Bickford, Mark / Robert, Constable -- Constructive Solutions of Ordinary Differential Equations / Bridges, Douglas S. -- A Nonstandard Hierarchy Comparison Theorem for the Slow and Fast Growing Hierarchy / Buchholz, Wilfried / Weiermann, Andreas -- Conservativity of transitive closure over weak constructive operational set theory / Cantini, Andrea / Crosilla, Laura -- Formal Baire Space in Constructive Set Theory / Curi, Giovanni / Rathjen, Michael -- Functional Interpretations of Classical and Constructive Set Theory / Diller, Justus -- Weak Theories of Truth and Explicit Mathematics / Eberhard, Sebastian / Strahm, Thomas -- Axiomatizing Truth: Why and How? / Feferman, Solomon -- On the Strength of some Semi-Constructive Theories / Feferman, Solomon -- On the Relation Between Various Negative Translations / Ferreira, Gilda / Oliva, Paulo -- A Finite Axiomatisation of Inductive-Inductive Definitions / Forsberg, Fredrik Nordvall / Setzer, Anton -- Some Conservative Extension Results on Classical and Intuitionistic Sequent Calculi / Ishihara, Hajime -- About the Strength of Operational Regularity / Jäger, Gerhard / Zumbrunnen, Rico -- Non-Deterministic |