Call for Papers & Call for Participation

                                 SymCon'02:
                     The Second International Workshop
              on Symmetry in Constraint Satisfaction Problems

                               CP'02 Workshop
           http://www.cs.cornell.edu/cp2002/ws-program.html
                          Sunday 8 September 2002
                              Ithaca, NY, USA

There are  many constraint satisfaction  problems that have a  great deal of
symmetry. For  example, when  colouring a graph,  many of the  solutions are
related  by  rotating  the colours.  Similarly,  when  solving a  tournament
timetabling problem, it does not matter in which order the participants play
the  first  games:  many  of the  solutions  are  related  by permuting  the
participants. Symmetry in constraint  satisfaction problems can be exploited
to increase the efficiency of search. This can be done by avoiding exploring
paths that have already been shown to be a dead-end in a symmetrical part of
the  search  tree, or  by  adding  constraints so  that  (ideally) only  one
assignment  per  equivalence  class is  enumerated.  This  process is  often
referred to as symmetry breaking or symmetry reduction.

This workshop  is to focus on the analysis  and development of techniques to
detect and  exploit symmetry in constraint  satisfaction problems. It is the
second workshop in a  series that started with SymCon'01 at CP'01 in Paphos,
Cyprus.

This will be a  half-day workshop, with open attendance. Researchers wishing
to give  talks should submit 4-to-8-page  extended abstracts,  in article or
LNCS style.  If necessary for time  reasons, only a subset  of the submitted
works will  be able  to be presented: a  selection will then be  made by the
Programme  Committee.  Towards making  the  informal  on-line proceedings  a
who-is-who  on symmetry, 1-page  statements  of interest are  also solicited
(say for  accepted papers on symmetry  at the CP'02 main  conference, or for
submitted  workshop  papers  that cannot  be  presented  for time  reasons).
Work-in-progress may  be submitted, and material  from other submissions may
be reused.

Programme Committee Chairs

   * Pierre Flener
     Information Technology, Dept of Computing Science, Uppsala University,
     Box 337, S-751 05 Uppsala, Sweden
     Fax: +46 18 51 19 25; Tel: +46 18 471 1028; [EMAIL PROTECTED]
   * Justin Pearson
     Information Technology, Dept of Computer Systems, Uppsala University,
     Box 337, S-751 05 Uppsala, Sweden
     Fax: +46 18 55 02 25; Tel: +46 18 471 7292; [EMAIL PROTECTED]

Programme Committee Members

   * Rolf Backofen, Universit�t Jena, Germany
   * Belaid Benhamou, Universit� de Provence (Aix-Marseille I), France
   * Torsten Fahle, Universit�t Paderborn, Germany
   * Pedro Meseguer, Universitat Auton�ma de Barcelona, Spain
   * Michela Milano, Universit� di Bologna, Italy
   * Barbara M. Smith, University of Huddersfield, England
   * Toby Walsh, Cork Constraint Computation Centre, Ireland

Submission Process

Extended abstracts of 4  to 8 LNCS/article-style pages are to be emailed, as
PS or PDF files, to [EMAIL PROTECTED] by Wednesday 10 July 2002.

Additionally, statements of interest  of 1 page may be emailed, as PS or PDF
files, to [EMAIL PROTECTED] by Monday 5 August 2002.

At least  one author of each presented  submission must attend the workshop.
All workshop attendees must pay the CP'02 workshop registration fee.

Important Dates

 Extended-abstract deadline:     Wednesday 10 July 2002
 Notification deadline:          Friday 26 July 2002
 Camera-ready-copy deadline:     Monday 5 August 2002
 Statement-of-interest deadline: Monday 5 August 2002
 Workshop:                       Sunday 8 September 2002

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Pierre Flener and Justin Pearson

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