Dr. Joe Pitt-Francis
Department of Computer Science
University of Oxford
Oxford, UK
Dr. Jonathan Whiteley
Department of Computer Science
University of Oxford
Oxford, UK
Series editor
Ian Mackie
Advisory board
Samson Abramsky, University of Oxford, Oxford, UK
Karin Breitman, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil
Chris Hankin, Imperial College London, London, UK
Dexter Kozen, Cornell University, Ithaca, USA
Andrew Pitts, University of Cambridge, Cambridge, UK
Hanne Riis Nielson, Technical University of Denmark, Kongens Lyngby, Denmark
Steven Skiena, Stony Brook University, Stony Brook, USA
Iain Stewart, University of Durham, Durham, UK
ISSN 1863-7310 Undergraduate Topics in Computer Science
ISBN 978-1-4471-2735-2 e-ISBN 978-1-4471-2736-9
DOI 10.1007/978-1-4471-2736-9
Springer London Dordrecht Heidelberg New York
British Library Cataloguing in Publication Data
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Library of Congress Control Number: 2012931858
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