Table Of ContentLecture Notes in Computer Science 1851
EditedbyG.Goos,J.HartmanisandJ.vanLeeuwen
3
Berlin
Heidelberg
NewYork
Barcelona
HongKong
London
Milan
Paris
Singapore
Tokyo
Magnu´s M. Halldo´rsson (Ed.)
Algorithm Theory –
SWAT 2000
7th Scandinavian Workshop onAlgorithm Theory
Bergen, Norway, July 5-7, 2000
Proceedings
1 3
SeriesEditors
GerhardGoos,KarlsruheUniversity,Germany
JurisHartmanis,CornellUniversity,NY,USA
JanvanLeeuwen,UtrechtUniversity,TheNetherlands
VolumeEditor
Magnu´sM.Halldo´rsson
UniversityofIcelandandUniversityofBergen
Taeknigardur,107Reykjavik,Iceland
E-mail:[email protected]
Cataloging-in-PublicationDataappliedfor
DieDeutscheBibliothek-CIP-Einheitsaufnahme
Algorithmtheory:proceedings/SWAT’2000,7thScandinavianWorkshop
onAlgorithmTheory,Bergen,Norway,July5-7,2000,Magnu´sM.
Halldo´rsson(ed.).-Berlin;Heidelberg;NewYork;Barcelona;Hong
Kong;London;Milan;Paris;Singapore;Tokyo:Springer,2000
(Lecturenotesincomputerscience;Vol.1851)
ISBN3-540-67690-2
CRSubjectClassification(1998):F.2,E.1,G.2,I.3.5,C.2
ISSN0302-9743
ISBN3-540-67690-2Springer-VerlagBerlinHeidelbergNewYork
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Preface
ThepapersinthisvolumewerepresentedatSWAT2000,theSeventhScandina-
vianWorkshoponAlgorithmTheory.Theworkshop,whichisreallyaconference,
has been held biennially since 1988, rotating between the (cid:12)ve Nordic countries
(Sweden, Norway, Finland, Denmark, and Iceland). It also has a loose associa-
tionwiththeWADS(WorkshoponAlgorithmsandDataStructures)conference
thatisheldinoddnumberedyears.SWATisintendedasaforumforresearchers
intheareaofdesignandanalysisofalgorithms.TheSWATconferencesarecoor-
dinatedbytheSWATsteeringcommittee,whichconsistsofB.Aspvall(Bergen),
S.Carlsson(Lule(cid:23)a),H.Hafsteinsson(U.Iceland),R.Karlsson(Lund),A.Lingas
(Lund), E. Schmidt (Aarhus), and E. Ukkonen (Helsinki).
The call for papers sought contributions in all areas of algorithms and data
structures, including computational geometry, parallel and distributed comput-
ing, graph theory, and computational biology. A total of 105 papers were sub-
mitted, out of which the program committee selected 43 for presentation. In
addition, invited lectures were presented by Uriel Feige (Weizmann), Mikkel
Thorup (AT&T Labs-Research), and Esko Ukkonen (Helsinki).
SWAT2000washeldinBergen,July5-7,2000,andwaslocallyorganizedby
a committee consisting of Pinar Heggernes, Petter Kristiansen, Fredrik Manne,
and Jan Arne Telle (chair), all from the department of informatics, University
of Bergen.
We wish to thank all the referees who aided in evaluating the papers. We
also thank The Research Council of Norway (NFR) and the City of Bergen for
(cid:12)nancial support.
July 2000 Magnu(cid:19)s M. Halldo(cid:19)rsson
VI Organization
Program Committee
Amotz Bar-Noy, Tel-Aviv Univ.
Luisa Gargano, Univ. of Salerno
Jens Gustedt, LORIA and INRIA Lorraine
Magnu(cid:19)s M. Halldo(cid:19)rsson, chair, U. Iceland and U. Bergen
Kazuo Iwama, Kyoto Univ.
Klaus Jansen, Univ. of Kiel
Jan Kratochv(cid:19)(cid:16)l, Charles Univ.
Andrzej Lingas, Lund Univ.
Jaikumar Radhakrishnan, Tata Institute
R. Ravi, Carnegie Mellon Univ.
Jo¨rg-Rudicher Sack, Carleton Univ.
Baruch Schieber, IBM Research
Sven Skyum, Univ. of Aarhus
Hisao Tamaki, Meiji Univ.
Jan Arne Telle, Univ. of Bergen
Esko Ukkonen, Univ. of Helsinki
Gerhard Woeginger, Technical Univ. Graz
Referees
Pankaj Agarwal Laura Grigori Jiri Matou(cid:20)sek
Helmut Alt Joachim Gudmundsson Peter Bro Miltersen
Larse Arge Bjarni V. Halldo(cid:19)rsson Gabriele Neyer
David Avis Mikael Hammar Anna O¨stlin
Luitpold Babel Michael Houle Rasmus Pagh
Bruno Beauquier David Hutchinson Jakob Pagter
Binay Bhattacharya Rahul Jain Christian N. S. Pedersen
Therese Biedl Jesper Jansson Marco Pellegrini
Andreas Bj¨orklund Rolf Karlsson Cecilia M. Procopiuc
Claudson Bornstein T. Kavita Wojtek Rytter
Gerth St(cid:28)lting Brodal Jyrki Kivinen Fatma Sibel Salman
Eranda C(cid:24)ela Rolf Klein Sven Schuierer
Timothy M. Chan Bettina Klinz Eike Seidel
Joseph Cheriyan Jochen K¨onemann Pranab Sen
Johanne Cohen Goran Konjevod Jop Sibeyn
Artur Czumaj S. Krishnan Michiel Smid
Frank Dehne Christos Levcopoulos Edyta Szymanska
Ingvar Eidhammer Moshe Lewenstein Ariel Tamir
Aleksei V. Fishkin Alex Lopez-Ortiz Santosh Vempala
E(cid:19)ric Fleury Ross McConnell S. Venkatesh
Fedor Fomin Ewa Malesinska Alexander Wol(cid:11)
Gudmund S. Frandsen Monaldo Mastrolilli Anders Yeo
Leszek Ga(cid:24)sieniec Brian M. Mayoh
Table of Contents
Invited Talks
Dynamic Graph Algorithms with Applications......................... 1
Mikkel Thorup (AT&T Labs-Research) and David R. Karger (MIT)
Coping with the NP-Hardness of the Graph Bandwidth Problem......... 10
Uriel Feige (Weizmann Institute)
Toward Complete Genome Data Mining in Computational Biology ....... 20
Esko Ukkonen (University of Helsinki)
Data Structures
A New Trade-Off for Deterministic Dictionaries........................ 22
Rasmus Pagh (University of Aarhus)
Improved Upper Bounds for Pairing Heaps ............................ 32
John Iacono (Rutgers University)
Maintaining Center and Median in Dynamic Trees ..................... 46
Stephen Alstrup, Jacob Holm (IT University of Copenhagen),
and Mikkel Thorup (AT&T Labs–Research)
Dynamic Planar Convex Hull with Optimal Query Time
and O(logn·loglogn) Update Time.................................. 57
Gerth Stølting Brodal and Riko Jacob (University of Aarhus)
Dynamic Partitions
A Dynamic Algorithm for Maintaining Graph Partitions ................ 71
Lyudmil G. Aleksandrov (Bulgarian Academy of Sciences)
and Hristo N. Djidjev (University of Warwick)
Data Structures for Maintaining Set Partitions ........................ 83
Michael A. Bender, Saurabh Sethia, and Steven Skiena
(SUNY Stony Brook)
Graph Algorithms
Fixed Parameter Algorithms for Planar Dominating Set
and Related Problems .............................................. 97
Jochen Alber (Universit¨at Tu¨bingen), Hans L. Bodlaender (Utrecht
University),HenningFernau,andRolfNiedermeier(Universita¨tTu¨bingen)
VIII
Embeddings of k-Connected Graphs of Pathwidth k .................... 111
Arvind Gupta (Simon Fraser University), Naomi Nishimura
(University of Waterloo), Andrzej Proskurowski (University
of Oregon), and Prabhakar Ragde (University of Waterloo)
On Graph Powers for Leaf-Labeled Trees.............................. 125
Naomi Nishimura, Prabhakar Ragde (University of Waterloo),
and Dimitrios M. Thilikos (Universitat Polit`ecnica de Catalunya)
Recognizing Weakly Triangulated Graphs by Edge Separability .......... 139
Anne Berry, Jean-Paul Bordat (LIRMM, Montpellier)
and Pinar Heggernes (University of Bergen)
Online Algorithms
Caching for Web Searching.......................................... 150
Bala Kalyanasundaram (Georgetown University), John Noga
(Technical University of Graz), Kirk Pruhs (University of Pittsburgh),
and Gerhard Woeginger (Technical University of Graz)
On-Line Scheduling with Precedence Constraints....................... 164
Yossi Azar and Leah Epstein (Tel-Aviv University)
Scheduling Jobs Before Shut-Down................................... 175
Vincenzo Liberatore (UMIACS)
Resource Augmentation in Load Balancing ............................ 189
Yossi Azar, Leah Epstein (Tel-Aviv University), and Rob van Stee
(Centre for Mathematics and Computer Science, CWI)
Fair versus Unrestricted Bin Packing ................................. 200
Yossi Azar (Tel-Aviv University), Joan Boyar, Lene M. Favrholdt,
Kim S. Larsen, and Morten N. Nielsen (University of Southern
Denmark)
Approximation Algorithms
A d/2 Approximation for Maximum Weight Independent Set in d-Claw
Free Graphs....................................................... 214
Piotr Berman (Pennsylvania State University)
Approximation Algorithms for the Label-CoverMAX and Red-Blue Set
Cover Problems.................................................... 220
David Peleg (Weizmann Institute)
Approximation Algorithms for Maximum Linear Arrangement ........... 231
Refael Hassin and Shlomi Rubinstein (Tel-Aviv University)
IX
Approximation Algorithms for Clustering
to Minimize the Sum of Diameters ................................... 237
Srinivas R. Doddi, Madhav V. Marathe (Los Alamos National
Laboratory), S. S. Ravi (SUNY Albany), David Scot Taylor (UCLA),
and Peter Widmayer (ETH)
Matchings
Robust Matchings and Maximum Clustering .......................... 251
Refael Hassin and Shlomi Rubinstein (Tel-Aviv University)
The Hospitals/Residents Problem with Ties .......................... 259
Robert W. Irving, David F. Manlove, and Sandy Scott (University
of Glasgow)
Network Design
Incremental Maintenance of the 5-Edge-Connectivity Classes of a Graph .. 272
Yefim Dinitz (Ben-Gurion University) and Ronit Nossenson
(Technion)
On the Minimum Augmentation of an (cid:7)-Connected Graph
to a k-Connected Graph ............................................ 286
Toshimasa Ishii and Hiroshi Nagamochi (Toyohashi University
of Technology)
Locating Sources to Meet Flow Demands in Undirected Networks ........ 300
Kouji Arata (Osaka University), Satoru Iwata (University of Tokyo),
Kazuhisa Makino, and Satoru Fujishige (Osaka University)
Improved Greedy Algorithms for Constructing Sparse Geometric Spanners 314
Joachim Gudmundsson, Christos Levcopoulos (Lund University),
and Giri Narasimhan (University of Memphis)
Computational Geometry
Computing the Penetration Depth of Two Convex Polytopes in 3D....... 328
Pankaj K. Agarwal (Duke University), Leonidas J. Guibas (Stanford
University),SarielHar-Peled(DukeUniversity),AlexanderRabinovitch
(Synopsys Inc.), and Micha Sharir (Tel Aviv University)
Compact Voronoi Diagrams for Moving Convex Polygons ............... 339
Leonidas J. Guibas (Stanford University), Jack Snoeyink (University
of North Carolina), and Li Zhang (Stanford University)
Efficient Expected-Case Algorithms for Planar Point Location ........... 353
Sunil Arya, Siu-Wing Cheng (Hong Kong University of Science and
Technology),DavidM.Mount(UniversityofMaryland),andH.Ramesh
(Indian Institute of Science)
