Graph-theoretic Concepts In Computer Science: 37th International Workshop, Wg 2011, Teplá Monastery, Czech Republic, June 21-24, 2011, Revised Papers ... Computer Science And General Issues)

Lecture Notes in Computer Science 6986 Commenced Publication in 1973 Founding and Former Series Editors: Gerhard Goos, Juris Hartmanis, and Jan van Leeuwen Editorial Board David Hutchison, UK Josef Kittler, UK Alfred Kobsa, USA John C. Mitchell, USA Oscar Nierstrasz, Switzerland Bernhard Steffen, Germany Demetri Terzopoulos, USA Gerhard Weikum, Germany Takeo Kanade, USA Jon M. Kleinberg, USA Friedemann Mattern, Switzerland Moni Naor, Israel C. Pandu Rangan, India Madhu Sudan, USA Doug Tygar, USA Advanced Research in Computing and Software Science Subline of Lectures Notes in Computer Science Subline Series Editors Giorgio Ausiello, University of Rome ‘La Sapienza’, Italy Vladimiro Sassone, University of Southampton, UK Subline Advisory Board Susanne Albers, University of Freiburg, Germany Benjamin C. Pierce, University of Pennsylvania, USA Bernhard Steffen, University of Dortmund, Germany Madhu Sudan, Microsoft Research, Cambridge, MA, USA Deng Xiaotie, City University of Hong Kong Jeannette M. Wing, Carnegie Mellon University, Pittsburgh, PA, USA Petr Kolman Jan Kratochvíl (Eds.) Graph-Theoretic Concepts in Computer Science 37th International Workshop, WG 2011 Teplá Monastery, Czech Republic, June 21-24, 2011 Revised Papers 13 Volume Editors Petr Kolman Jan Kratochvíl KAM MFF UK Charles University Malostranské nám 25, 11800 Praha 1, Czech Republic E-mail: {kolman, honza}@kam.mff.cuni.cz ISSN 0302-9743 e-ISSN 1611-3349 ISBN 978-3-642-25869-5 e-ISBN 978-3-642-25870-1 DOI 10.1007/978-3-642-25870-1 Springer Heidelberg Dordrecht London New York Library of Congress Control Number: Applied for CR Subject Classification (1998): G.2.2, I.2.8, E.1, F.2, I.3.5, C.2 LNCS Sublibrary: SL 1 – Theoretical Computer Science and General Issues © Springer-Verlag Berlin Heidelberg 2011 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. The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Typesetting: Camera-ready by author, data conversion by Scientific Publishing Services, Chennai, India Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com) Preface The 37th International Workshop on Graph-Theoretic Concepts in Computer Science (WG 2011) took place in Tepl´a Monastery, Czech Republic, during June 21–24, 2011. It was attended by 80 participants who came from all over the world not only to deliver or listen to interesting talks, but also to celebrate the 65th birthday of Ludˇek Kuˇcera, a long-time member of the WG Steering Committee. The co