***************** SUBMISSION DEADLINE APRIL 23, 2007 *******************

Call for Papers
Ninth International Workshop on Termination (WST 2007)
Paris, France, June 29, 2007
Affiliated with RDP 2007

Termination is a fundamental topic in computer science. Though termination of
processes is often a strict requirement, it may be hard to establish. Classical
results state the undecidability of various termination problems, so
research focuses on automated methods that prove termination or
non-termination in practical cases. The topic is challenging both in theory
(mathematical logic, proof theory) and practice (software development, formal
methods), and many interesting ramifications are yet to be explored.

The 9th International Workshop on Termination will delve into all aspects of
termination. It will continue the sequence of successful workshops held in St.
Andrews (1993), La Bresse (1995), Ede (1997), Dagstuhl (1999), Utrecht (2001),
Valencia (2003), Aachen (2004), and Seattle (2006). We hope to attain the same
friendly atmosphere as those past workshops. The intent is to bring together, in
an informal setting, researchers interested in various aspects of termination,
whether this interest be practical or theoretical, primary or derived. The
workshop is hoped to provide a ground for cross-fertilisation of ideas from term
rewriting and from programming.

Contributions from the imperative, object-oriented, constraint, functional, and
logic programming communities, and papers investigating new applications of
termination are particularly welcome.

Paper Submissions:
Extended abstracts in the prescribed format, not exceeding 4 pages, should be
submitted electronically through EasyChair's WST 2007 submission site
http://www.easychair.org/WST2007/.
A common workshop style file will be made available on the WST'2007 web site.
Papers should be submitted in PostScript or PDF format. We expect proceedings to
be made available through the Computing Research Repository, CoRR.

The Termination Competition:
The competition will run again in 2007, and entries are strongly encouraged.
Detailed instructions for submission of problems and programs will be made
available at the competition website
http://www.lri.fr/~marche/termination-competition/2007/

Program Committee
Nachum Dershowitz (Tel Aviv, Israel)
Daniel De Schreye (Leuven, Belgium)
Samir Genaim (Madrid, Spain)
Juergen Giesl (Aachen, Germany)
Isabelle Gnaedig (Nancy, France)
Dieter Hofbauer (Kassel, Germany), co-chair
Aart Middeldorp (Innsbruck, Austria)
Etienne Payet (La Reunion, France)
Alexander Serebrenik (Eindhoven, The Netherlands), co-chair

Termination Competition Committee
Claude Marche (Paris, France)
Johannes Waldmann (Leipzig, Germany)
Hans Zantema (Eindhoven, The Netherlands)

Workshop Themes (non-exhaustive list)
Termination of programs
Termination of rewriting
Normalization of lambda calculi
Implementation of termination methods
Challenging termination problems and proofs
Application of termination methods, e.g. to program transformation and
compilation
Comparison and classification of termination methods
Non-termination detection
Termination methods for theorem provers
Termination in distributed systems
Termination proof methods for liveness and fairness
Derivational complexity
Well-quasi-orderings and ordinal notations

Important Dates:
Deadline for electronic submission of papers :  April 23, 2007
Notification of acceptance                   :  May 14, 2007
Deadline for final versions                  :  May 27, 2007

Competition Deadlines:
Submission of public problems     :  May 1, 2007
Registration of termination tools :  May 21, 2007
Submission of secret problems     :  June 1, 2007
Submission of termination tools   :  June 1, 2007
Start of competition              :  June 4, 2007

Workshop Venue and Related Events:
WST 2007 is part of the Federated Conference on Rewriting, Deduction, and
Programming 2007. Co-located events include RTA'07, HOR'07, PATE'07,
RULE'07, SecReT'07, UNIF'07, WFLP'07, and WRS'07.
These colloquia will run from June 25 to June 29, 2007, in Paris (France).
For details see the RDP website at http://www.rdp07.org/.

Web Sites
WST 2007: http://www.rdp07.org/wst.html
Termination Competition: http://www.lri.fr/~marche/termination-competition/2007/
RDP 2007: http://www.rdp07.org/