ANNALS OF PURE AND APPLIED LOGIC Volume 104 - 2000 Chief Guest Editor C. Butz Department of Mathematics and Statistics, Burnside Hall, McGill University, 805 Sherbrooke Street West, Montreal, Que., Canada H3A 2K6 E-mail address: [email protected] Guest-editors Ulrich Kohlenbach S¢gren Riis Glynn Winskel Managing Editors |. Moerdijk (Co-ordinating Editor) (Categorical logic, Constructive/intuition- istic logic), Rijksuniversiteit Utrecht, Mathematisch Instituut, Postbus 80.010, 3508 TA Utrecht, The Netherlands S.N. Artemov Steklov Mathematical Institute, Vavilova 42, 117966 Moscow GSP-1, Russia (Proof Theory, Logic and Computer Science) J.-Y. Girard CNRS, Institut de Mathematiques de Luminy, UPR 9016, 163 Avenue de Luminy, Case 930, 13288 Marseille Cedex 9, France T. Jech Mathematics Department, The Pennsylvania State University, University Park, PA 16802, USA (Set Theory) P.G. Kolaitis Computer Science Department, University of California, Santa Cruz, CA 95064, USA (Logic and Computer Science) A. Scedrov Department of Mathematics, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104-6395, USA R.|. Soare Department of Mathematics, University of Chicago, 5734 University Avenue, Chicago, IL 60637-1546, USA (Computability Theory, Recursion in Logic) (E-mail submissions in LaTeX greatly preferred, [email protected]) A.J. Wilkie Mathematical Institute, University of Oxford, 24-29 St. Giles, Oxford, OX1 3LB, UK (Model Theory) Advisory Editors J.A. Bergstra FWI Vakgroep Programmatuur, Universiteit van Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands W. Buchholz Mathematisches Institut der Ludwig-Maximilians-Universitat, TheresienstraRe 39, D-80333 Miinchen, Germany S.R. Buss University of California, Departments of Mathematics & Com- puter Science, San Diego, La Jolla, CA 92093-0112, USA G. Huet INRIA, Domaine de Voluceau, B.P. 105, 78153 Le Chesnay Cedex, France J. Krajicek Mathematical Institute, Academy of Sciences, Zitna 25, Prague 115 67, Czech Republic J.A. Makowsky Faculty of Computer Science, Technion - Israel Institute of Tech- nology, Technion City, Haifa 32000, Israel D. Marker Department of Mathematics, University of Illinois at Chicago, 851 S. Morgan Street, Chicago, IL 60607, USA D. Normann Institute of Mathematics, P.O. Box 1053, Blindern, 0316 Oslo, Norway H. Ono School of Information Science, Japan Advanced Institute of Science and Technology, Tatsunokuchi, Ishikawa 923-12, Japan Editors Emeriti C.C. Chang, D. van Dalen, J.E. Fenstad, Y. Gurevich, J. Hartmanis, K. Kunen, A. Mostowski, A. Nerode, A. Prestel, M.O. Rabin, H. Roger Jr. ANNALS OF PURE AND APPLIED LOGIC Volume 104 - 2000 Chief Guest Editor C. Butz Department of Mathematics and Statistics, Burnside Hall, McGill University, 805 Sherbrooke Street West, Montreal, Que., Canada H3A 2K6 E-mail address: [email protected] Guest-editors Ulrich Kohlenbach S¢gren Riis Glynn Winskel NORTH-HOLLAND - Amsterdam - Lausanne - New York - Oxford - Shannon - Tokyo © 2000 Elsevier Science B.V. All rights reserved. This journal and the individual contributions contained in it are protected under copyright by Elsevier Science B.V. and the following terms and conditions apply to their use: Photocopying Single photocopies of single articles may be made for personal use as allowed by national copyright laws. Permission of the publisher and payment of a fee is required for all other photocopying, including multiple or systematic copying, copying for advertising or promotional purposes, resale, and all forms of document delivery. 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Notice No responsibility is assumed by the Publisher for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or ideas contained in the material herein. Because of rapid advances in the medical sciences, in particular, independent verification of diagnoses and drug dosages should be made. Although all advertising material is expected to conform to ethical (medical) standards, inclusion in this publication does not constitute a guarantee or endorsement of the quality or value of such product or of the claims made of it by its manufacturer. ANNALS OF PURE AND APPLIED LOGIC Volume 104, Numbers 1-3, 15 July 2000 SPECIAL ISSUE Proceedings of the Workshop on Proof Theory and Complexity PTAC’98 University of Aarhus, Denmark, August 3-7, 1998 Guest-editors Carsten Butz Ulrich Kohlenbach S¢gren Riis Glynn Winskel Contents Preface N.H. Arai Relative efficiency of propositional proof systems: resolution vs. cut-free LK S.J. Bellantoni, K.-H. Niggl and H. Schwichtenberg Higher type recursion, ramification and polynomial time W. Burr Functional interpretation of Aczel’s constructive set theory S. Feferman and T. Strahm The unfolding of non-finitist arithmetic L. Hendriks Doing logic by computer: interpolation in fragments of intuitionistic propositional logic M. Hofmann Safe recursion with higher types and BCK-algebra G. Mints Reduction of finite and infinite derivations I. Moerdijk and E. Palmgren Wellfounded trees in categories H. de Nivelle Deciding the E*-class by an a posteriori, liftable order J. van Oosten and A.K. Simpson Axioms and (counter)examples in synthetic domain theory C. Pollett Multifunction algebras and the provability of PH| Contents T Strahm The non-recursive yp operator, fixed point theories with ordinals, and the bar rule L. Trevisan Interactive and probabilistic proof-checking Author Index