皆様

合流性 (チャーチ・ロッサ性) に関するワークショップ IWC 2012 の参加者募集と 合流性自動証明ツールのコンペティション CoCo 2012 の参加ツール募集 の案内をお知らせ致します。IWCの早期参加申し込み締切りは4月25日になって おります。

廣川　直（北陸先端科学技術大学院大学）

====================================================================== Call for Participation IWC 2012 1st International Workshop on Confluence

29 May 2012, Nagoya, Japan, collocated with RTA 2012 http://cl-informatik.uibk.ac.at/events/iwc-2012/ ======================================================================

Recently there is a renewed interest in confluence research, resulting in new techniques, tool support as well as new applications. The workshop aims at promoting further research in confluence and related properties. The workshop is collocated with the 23rd International Conference on Rewriting Techniques and Applications (RTA 2012). During the workshop the 1st Confluence Competition (CoCo 2012) takes place (see below).

IMPORTANT DATES: * early registration April 25, 2012 JST (GMT+9) * registration May 9, 2012 JST (GMT+9) * workshop May 29, 2012 JST (GMT+9)

Please register at:

https://apollon.nta.co.jp/rta2012/

INVITED SPEAKERS: * Vincent van Oostrom Utrecht University * Yoshihito Toyama Tohoku University

ACCEPTED PAPERS: * Bertram Felgenhauer: A Proof Order for Decreasing Diagrams * Dominik Klein and Nao Hirokawa: Confluence of Non-Left-Linear TRSs via Relative Termination (Extended Abstract) * Christian Nemeth, Harald Zankl and Nao Hirokawa: IaCOP - Interface for the Administration of COPS * Kristoffer Rose: A Case for Completion Modulo Equivalence * Thomas Sternagel, René Thiemann, Harald Zankl and Christian Sternagel: Recording Completion for Finding and Certifying Proofs in Equational Logic * Hans Zantema: Automatically Finding Non-Confluent Examples in Abstract Rewriting

ORGANISING COMMITTEE: * Nao Hirokawa JAIST * Aart Middeldorp University of Innsbruck * Naoki Nishida Nagoya University

====================================================================== Second Call for Provers CoCo 2012 1st Confluence Competition

http://coco.nue.riec.tohoku.ac.jp/2012/ ======================================================================

Recently, several new implementations of confluence proving/disproving tools are reported and interest for proving/disproving confluence "automatically" has been grown. CoCo aims to foster the development of techniques for proving/disproving confluence automatically by setting up a dedicated and fair confluence competition among confluence proving/disproving tools.

The 1st Confluence Competition (CoCo 2012) runs during the 1st International Workshop on Confluence (IWC 2012), which is collocated with the 23rd International Conference on Rewriting Techniques and Applications (RTA 2012) at Nagoya University, Japan. In this competition a category for first-order term rewrite systems will be run. Other categories (e.g., higher-order) will be considered if there are tools and problems.

IMPORTANT DATES: * registration April 1, 2012 - May 15, 2012 * system description April 15, 2012 - May 15, 2012 * tool submission May 1, 2012 - May 15, 2012 * competition May 29, 2012

REGISTRATION/SUBMISSION: Registration and tool submission will be via the email address:

coco-sc [AT] jaist.ac.jp

Tools must be able to read input files written in the old TPDB format. The output of the tools must contain an answer in the first line followed by some proof argument understandable for human experts. Valid answers are YES (the input is confluent) and NO (the input is not confluent). Every other answer is interpreted as the tool could not determine the status of the input. For more information including competition rules, see

http://coco.nue.riec.tohoku.ac.jp/

All registered tool authors are asked to submit a one-page system description paper in EasyChair style. Submission is via EasyChair at

https://www.easychair.org/account/signin.cgi?conf=iwc2012

These papers will appear in the proceedings of IWC 2012.

ORGANISING COMMITTEE: * Takahito Aoto Tohoku University (chair) * Nao Hirokawa JAIST * Harald Zankl University of Innsbruck