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The Bulletin of Symbolic Logic the Bulletin of Symbolic Logic THE BULLETIN OF SYMBOLIC LOGIC THE BULLETIN OF SYMBOLIC LOGIC Edited by Frank Wagner, Managing Editor Vol. 20 Vol. Patricia Blanchette Menachem Kojman Andrea Cantini Leonid Libkin Thierry Coquand André Nies . Number 2 Deirdre Haskell Reviews Editors Ernest Schimmerling, Managing Editor for Reviews . June 2014 John Burgess Colin McLarty Mark Colyvan Rahim Moosa Anuj Dawar Kai Wehmeier Michael Fourman Matthias Wille . Pages 141-274 Steffen Lempp VOLUME 20 • NUMBER 2 • JUNE 2014 • ISSN 1079-8986 Copyright © 2014 by the Association for Symbolic Logic. All rights reserved. Reproduction by photostat, photo-print, microfi lm, or like process by permission only. Cambridge Journals Online For further information about this journal please go to the journal web site at: journals.cambridge.org/bsl PUBLISHED BY CAMBRIDGE UNIVERSITY PRESS FOR AND ON BEHALF OF THE ASSOCIATION OF SYMBOLIC LOGIC. Downloaded from https://www.cambridge.org/core. IP address: 170.106.35.234, on 29 Sep 2021 at 04:10:23, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/bsl.2014.22 The BULLETIN, the JOURNAL and the REVIEW OF SYMBOLIC LOGIC are the official organs of the Association for Symbolic Logic, an international organization for furthering research in logic and the exchange of ideas among mathematicians, computer scientists, linguists, and others interested in this fi eld. The BULLETIN encourages submissions of Articles and Communications in all areas of logic, including mathematical or philosophical logic, logic in computer science or linguistics, the history or philosophy of logic, and applications of logic to other fields. The BULLETIN also publishes reviews of publications in logic. Editors THE BULLETIN OF SYMBOLIC LOGIC (ISSN print: 1079–8986, ISSN online: 1943–5894) is pub- Frank Wagner (Managing Editor), Insitut Camille Jordan, UMR 5208, Bâtiment Braconnier, Université lished quarterly, in the months of March, June, September. and December, by the Association for Symbolic Lyon 1, 21, avenue Claude Bernard, 69622 Villeurbanne Cedex, France Logic, Inc., 124 Raymond Avenue, Poughkeepsie, NY 12604–0001, USA. Periodicals postage is paid at [email protected] Poughkeepsie NY and at additional mailing offi ces. The BULLETIN is distributed with THE JOURNAL Patricia Blanchette, Department of Philosophy, University of Notre Dame, 100 Malloy Hall, Notre Dame, IN 46556, USA OF SYMBOLIC LOGIC. 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IP address: 170.106.35.234, on 29 Sep 2021 at 04:10:23, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/bsl.2014.22 TABLE OF CONTENTS ARTICLES Approximating Beppo Levi’s Principio Di Approssimazione, by RICCARDO BRUNI and PETER SCHUSTER ........................................................141 Nonstandard models in recursion theory and reverse mathematics, by C. T. CHONG, WEI LI, and YUE YANG .........................................................170 REVIEWS Two papers by Ulrich Felgner on the history of mathematics, Reviewed by STEFFEN LEMPP ............................................................................201
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