Faster Multiplication in GF(2)[x]

In this paper, we discuss an implementation of various algorithms for multiplying polynomials in Open image in new window : variants of the window methods, Karatsuba’s, Toom-Cook’s, Schönhage’s and Cantor’s algorithms. For most of them, we propose improve

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Editorial Board David Hutchison Lancaster University, UK Takeo Kanade Carnegie Mellon University, Pittsburgh, PA, USA Josef Kittler University of Surrey, Guildford, UK Jon M. Kleinberg Cornell University, Ithaca, NY, USA Alfred Kobsa University of California, Irvine, CA, USA Friedemann Mattern ETH Zurich, Switzerland John C. Mitchell Stanford University, CA, USA Moni Naor Weizmann Institute of Science, Rehovot, Israel Oscar Nierstrasz University of Bern, Switzerland C. Pandu Rangan Indian Institute of Technology, Madras, India Bernhard Steffen University of Dortmund, Germany Madhu Sudan Massachusetts Institute of Technology, MA, USA Demetri Terzopoulos University of California, Los Angeles, CA, USA Doug Tygar University of California, Berkeley, CA, USA Gerhard Weikum Max-Planck Institute of Computer Science, Saarbruecken, Germany

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Alfred J. van der Poorten Andreas Stein (Eds.)

Algorithmic Number Theory 8th International Symposium, ANTS-VIII Banff, Canada, May 17-22, 2008 Proceedings

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Volume Editors Alfred J. van der Poorten ceNTRe for Number Theory Research 1 Bimbil Place, Killara, NSW 2071, Australia E-mail: [email protected] Andreas Stein Carl von Ossietzky Universität Oldenburg Institut für Mathematik 26111 Oldenburg, Germany E-mail: [email protected]

Library of Congress Control Number: 2008925108 CR Subject Classification (1998): F.2, G.2, E.3, I.1 LNCS Sublibrary: SL 1 – Theoretical Computer Science and General Issues ISSN ISBN-10 ISBN-13

0302-9743 3-540-79455-7 Springer Berlin Heidelberg New York 978-3-540-79455-4 Springer Berlin Heidelberg New York

This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, re-use of illustrations, recitation, broadcasting, reproduction on microfilms or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable to prosecution under the German Copyright Law. Springer is a part of Springer Science+Business Media springer.com © Springer-Verlag Berlin Heidelberg 2008 Printed in Germany Typesetting: Camera-ready by author, data conversion by Scientific Publishing Services, Chennai, India Printed on acid-free paper SPIN: 12262908 06/3180 543210

Preface

The first Algorithmic Number Theory Symposium took place in May 1994 at Cornell University. The preface to its proceedings has the organizers expressing the hope that the meeting would be “the first in a long series of international conferences on the algorithmic, computational, and complexity theoretic aspects of number theory.” ANTS VIII was held May 17–22, 2008 at the Banff Centre in Banff, Alberta, Canada. It was the eighth in this lengthening series. The conference included four invited talks, by Johannes Buchmann (TU ´ Darmstadt), Andrew Granville (Universit´e de Mont