January 2024 - Termtools - lists.rwth-aachen.de

TRS format at TermComp
by Florian Frohn 13 Jun '24

13 Jun '24

Dear all, at the last WST, there were some discussions about the input format for TRSs. My takeaway was that not everyone is happy with the current XML format. So we (the TermComp SC) recently started to discuss whether the format should be changed. As far as I can see, there are three obvious options: (a) keep the current format Pro: no work Contra: not human readable (b) go back to the old format [1] (here's [2] an example) Pro: - human readable - the same format is used for other categories (e.g., Complexity of ITSs and Termination of Integer TRSs) - some tools can still parse it Contra: There were some issues with the semantics, in particular if there were several VAR sections. However, from my understanding, these issues can be resolved by forbidding more than one VAR section. (c) a new S-expression based format has been proposed for the confluence competition [3] Pro: human readable(?) Contra: no tool can parse it yet So if you compete, or are interested in, the TRS categories at TermComp, please let us know what you think. I'm also particularly interested in the following questions: - If you participate, can your tool still parse the old format? - Do you recall more details about the reasons for the switch from the old format to the current one? A related (but mostly independent) question is whether we should separate the properties to be analyzed (full vs innermost rewriting, termination vs complexity etc.) from the actual TRS. That could avoid a lot of redundancy in the TPDB. If you have an opinion on that, please share it. Thanks, Florian [1] https://www.lri.fr/~marche/tpdb/format.html [2] https://aprove.informatik.rwth-aachen.de/interface/v-AProVE2023/trs_wst [3] http://cl-informatik.uibk.ac.at/iwc/2023/proceedings.pdf, page 32

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discussions & poll regarding the new termCOMP format
by Florian Frohn 21 Feb '24

21 Feb '24

Dear all, in case you missed it: There are some interesting discussions about adapting the ARI format for termCOMP, see [1]. In particular, there's also a poll about the new format for SRSs [2]. Currently, there are five votes only... So if you're interested, please have a look at the corresponding discussion [3] and vote! Best Florian [1] https://github.com/orgs/TermCOMP/discussions [2] https://github.com/orgs/TermCOMP/discussions/88 [3] https://github.com/orgs/TermCOMP/discussions/87

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Probabilistic Rewriting at termCOMP
by Florian Frohn 15 Jan '24

15 Jan '24

Dear all, after the nice interactive 0th probabilistic termination competition last year, we plan to introduce new (non-interactive) categories for probabilistic rewriting. A proposal for the new categories is available in this GitHub discussion [1]. Please share your opinions there. Best Florian [1] https://github.com/orgs/TermCOMP/discussions/82

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FSCD 2024: Second Call for Papers
by Carsten Fuhs 11 Jan '24

11 Jan '24

===================================================== Updated information on: co-location, invited speakers ===================================================== SECOND CALL FOR PAPERS Ninth International Conference on Formal Structures for Computation and Deduction (FSCD 2024) July 10-13, 2024, Tallinn, Estonia https://fscd-conference.org/2024 FSCD 2024 will be co-located with ICALP 2024 and LICS 2024. https://compose.ioc.ee/icalp2024/ https://lics.siglog.org/lics24/ IMPORTANT DATES --------------- All deadlines are midnight anywhere-on-earth (AoE); late submissions will not be considered. Abstract: February 5, 2024 Submission: February 12, 2024 Rebuttal: April 2-6, 2024 Notification: April 22, 2024 Final version: May 6, 2024 INVITED SPEAKERS ---------------- Delia Kesner, Université Paris Cité Stephanie Weirich, UPenn (joint w/ ICALP and LICS) Sebastian Ullrich, LEAN Focused Research Organisation N.N. (TBA) OVERVIEW -------- FSCD (https://fscd-conference.org/) covers all aspects of formal structures for computation and deduction from theoretical foundations to applications. Building on two communities, RTA (Rewriting Techniques and Applications) and TLCA (Typed Lambda Calculi and Applications), FSCD embraces their core topics and broadens their scope to closely related areas in logic, models of computation, semantics and verification in new challenging areas. The suggested, but not exclusive, list of topics for submission is: 1. Calculi: - Rewriting systems (string, term, higher-order, graph, conditional, modulo, infinitary, etc.); - Lambda calculus; - Logics (first-order, higher-order, equational, modal, linear, classical, constructive, etc.); - Proof theory (natural deduction, sequent calculus, proof nets, etc.); - Type theory and logical frameworks; - Homotopy type theory; - Process algebras (synchronous, asynchronous, static and dynamic semantics with and without time, etc.); - Quantum calculi. 2. Methods in Computation and Deduction: - Type systems (polymorphism, dependent, recursive, intersection, session, etc.); - Induction, coinduction; - Matching, unification, completion, orderings; - Strategies (normalization, completeness, etc.); - Tree automata; - Model building and model checking; - Proof search and theorem proving; - Constraint solving and decision procedures. 3. Semantics: - Operational semantics and abstract machines; - Game Semantics and applications; - Domain theory and categorical models; - Quantitative models (timing, probabilities, etc.); - Quantum computation and emerging models in computation. 4. Algorithmic Analysis and Transformations of Formal Systems: - Type inference and type checking; - Abstract Interpretation; - Complexity analysis and implicit computational complexity; - Checking termination, confluence, derivational complexity and related properties; - Symbolic computation. 5. Tools and Applications: - Programming and proof environments; - Verification tools; - Proof assistants and interactive theorem provers; - Applications in industry; - Applications of formal systems in other sciences; - Applications of formal systems in education. 6. Formal Systems for Semantics and Verification in new challenging areas: - Certification; - Security; - Blockchain protocols; - Data bases; - Deep learning and machine learning algorithms; - Planning. PUBLICATION ----------- The proceedings will be published as an electronic volume in the Leibniz International Proceedings in Informatics (LIPIcs) of Schloss Dagstuhl. All LIPIcs proceedings are open access. SPECIAL ISSUE ------------- Authors of selected papers will be invited to submit an extended version to a special issue of Logical Methods in Computer Science, or to TheoretiCS. SUBMISSION GUIDELINES --------------------- The submission site is: https://easychair.org/conferences/?conf=fscd2024 Submissions must be formatted using the LIPIcs style files (https://submission.dagstuhl.de/series/details/5#author) and submitted via EasyChair. Submissions can be made in two categories. Regular research papers are limited to 15 pages, excluding references and appendices. They must present original research which is unpublished and not submitted elsewhere. System descriptions are limited to 15 pages, excluding references. Shorter papers are welcome and will be given equal consideration. A system description must present new software tools, or significantly new versions of such tools, in which FSCD topics play an important role. An archive of the code with instructions on how to install and run the tool must be submitted. In addition, a webpage where the system can be experimented with should be provided. One author of each accepted paper is expected to register and present the work in person at the conference. Alternatively to in-person presentation, also online presentation is possible, but in-person registration by at least one author will still be required. BEST PAPER AWARD BY JUNIOR RESEARCHERS -------------------------------------- The program committee will select a paper in which at least one author is a junior researcher, i.e. either a student or whose PhD award date is less than three years from the first day of the meeting. When submitting the paper, other authors should declare to the PC Chair that at least 50% of contribution is made by the junior researcher(s). PROGRAM COMMITTEE CHAIR ----------------------- Jakob Rehof, TU Dortmund University Email: fscd2024 at easychair.org PROGRAM COMMITTEE ----------------- Thorsten Altenkirch, University of Nottingham Sandra Alves, University of Porto Takahito Aoto, Niigata University Mauricio Ayala-Rincón, Brasilia University Stephanie Balzer, CMU Thierry Coquand, University of Gothenburg Alejandro Díaz-Caro, Quilmes National University & CONICET-Buenos Aires University Claudia Faggian, CNRS, Université de Paris Silvia Ghilezan, University of Novi Sad Simon Gay, University of Glasgow Cezary Kaliszyk, University of Innsbruck Ambrus Kaposi, Eötvös Loránd University, Budapest Dexter Kozen, Cornell University Dominique Larchey-Wendling, CNRS, Loria Marina Lenisa, University of Udine Sonia Marin, University of Birmingham Naoki Nishida, Nagoya University Christine Paulin-Mohring, Paris-Saclay University Pierre-Marie Pédrot, Inria Rennes-Bretagne-Atlantique Elaine Pimentel, University College London Jakob Rehof (Chair), TU Dortmund University Simona Ronchi della Rocca, University of Torino Sylvain Schmitz, Université Paris Cité Aleksy Schubert, University of Warsaw Jakob Grue Simonsen, University of Copenhagen Kathrin Stark, Heriot-Watt University, Edinburgh Lutz Straßburger, Inria Saclay Tachio Terauchi, Waseda University Sarah Winkler, Free University of Bolzano CONFERENCE CHAIR ---------------- Niccolò Veltri, Tallinn University of Technology WORKSHOP CHAIR -------------- Luigi Liquori, Inria STEERING COMMITTEE WORKSHOP CHAIR -------------------------------- Cynthia Kop, Radboud University Nijmegen PUBLICITY CHAIR --------------- Carsten Fuhs, Birkbeck, University of London FSCD STEERING COMMITTEE ----------------------- Herman Geuvers (Chair), Radboud University Nijmegen Patrick Baillot, CNRS, Université de Lille Alejandro Díaz-Caro, Quilmes National University & CONICET-Buenos Aires University Amy Felty, University of Ottawa Carsten Fuhs, Birkbeck, University of London Marco Gaboardi, Boston University Jürgen Giesl, RWTH Aachen University Delia Kesner, Université Paris Cité Naoki Kobayashi, University of Tokyo Cynthia Kop, Radboud University Nijmegen Luigi Liquori, Inria Giulio Manzonetto, Université Paris-Nord Daniele Nantes, Imperial College London / University of Brasilia Femke van Raamsdonk, Vrije Universiteit Amsterdam

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