February 2023 - Annonce

Paper published in Information & Computation
by Uli Fahrenberg 05 Mar '23

05 Mar '23

The following paper has been published in Information & Computation: Posets With Interfaces as a Model for Concurrency Uli Fahrenberg, Christian Johansen, Georg Struth, Krzysztof Ziemiański We introduce posets with interfaces (iposets) and generalise their standard serial composition to a new gluing composition. In the partial order semantics of concurrency, interfaces and gluing allow modelling events that extend in time and across components. Alternativelytaking a decompositional view, interfaces allow cutting through events, while serial composition may only cut through edges of a poset. We show that iposets under gluing composition form a category, which generalises the monoid of posets under serial composition up to isomorphism. They form a 2-category when a subsumption order and a lax tensor in the form of a non-commutative parallel composition are added, which generalises the interchange monoids used for modelling series-parallel posets. We also study the gluing-parallel hierarchy of iposets, which generalises the standard series-parallel one. The class of gluing-parallel iposets contains that of series-parallel posets and the class of interval orders, which are well studied in concurrency theory, too. We also show that it is strictly contained in the class of all iposets by identifying several forbidden substructures. https://www.lrde.epita.fr/wiki/Publications/fahrenberg.22.iandc

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Paper accepted at FM 2023: Energy Problems in Finite and Timed Automata with Büchi Conditions
by Uli Fahrenberg 05 Mar '23

05 Mar '23

We are happy to announce that the following article has been accepted at the he 25th International Symposium on Formal Methods (FM 2023) to be held in Lübeck in March 2023: Energy Problems in Finite and Timed Automata with Büchi Conditions Sven Dziadek, Uli Fahrenberg and Philipp Schlehuber-Caissier Abstract: We show how to efficiently solve energy Büchi problems in finite weighted Büchi automata and in one-clock weighted timed Büchi automata; all our algorithms are implemented in a pipeline based on TChecker and Spot. Solving the latter problem is done by using the corner-point abstraction; the former problem is handled by a modified version of Bellman-Ford interleaved with Couvreur's algorithm. The paper is available at https://arxiv.org/abs/2205.04392

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[CfP] 16th European Lisp Symposium, April 24-25, Amsterdam
by Didier Verna 02 Feb '23

02 Feb '23

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 16th European Lisp Symposium Call for Papers April 24-25, 2023 Startup Village, Amsterdam, Nederlands https://www.european-lisp-symposium.org/2023 Sponsored by EPITA, DIRO, MLPrograms, Franz Inc., and SISCOG ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Recent News ~~~~~~~~~~~ First keynote speaker announced: Gerald Jay Sussman, MIT, MA, USA Important Dates ~~~~~~~~~~~~~~~ - Submission deadline: February 26, 2023 - Author notification: March 26, 2023 - Final papers due: April 9, 2023 - Symposium: April 24-25, 2023 Scope ~~~~~ The European Lisp Symposium is a premier forum for the discussion and dissemination of all aspects of design, implementation, and application of any of the Lisp dialects, including Common Lisp, Scheme, Emacs Lisp, Clojure, Racket, ACL2, AutoLisp, ISLISP, Dylan, SKILL, Hy, Shen, Carp, Janet, uLisp, Picolisp, Gamelisp, TXR, and so on. We encourage everyone interested in Lisp to participate. The European Lisp Symposium invites high quality papers about novel research results, insights and lessons learned from practical applications, and educational perspectives. We also encourage submissions about known ideas as long as they are presented in a new setting and/or in a highly elegant way. Topics include but are not limited to: - context-, aspect-, domain-oriented and generative programming - macro-, reflective-, meta- and/or rule-based development approaches - language design and implementation - language integration, inter-operation, and deployment - development methodologies, support, and environments - educational approaches and perspectives - experience reports and case studies Technical Program ~~~~~~~~~~~~~~~~~ We invite submissions in the following forms. * Papers: technical papers of up to 8 pages that describe original results or explain known ideas in new and elegant ways. * Experience reports: papers of up to 6 pages describing a successful use of a Lisp dialect and/or analyzing obstacles that have kept it from working in practice. * Tutorials: abstracts of up to 4 pages for in-depth presentations about topics of special interest. * Demonstrations: abstracts of up to 4 pages for demonstrations of tools, libraries, and applications. All submissions should be formatted following the ACM SIGS guidelines and include ACM Computing Classification System 2012 concepts and terms. Submissions should be uploaded to Easy Chair, at the following link http://www.easychair.org/conferences/?conf=els2023. Note: to help us with the review process please indicate the type of submission by entering either "paper", "demo", or "tutorial" in the Keywords field. Programme Chair ~~~~~~~~~~~~~~~ Stefan Monnier, DIRO, Université de Montréal, Canada Programme Committee ~~~~~~~~~~~~~~~~~~~ Stefan Monnier, Université de Montréal, Canada Mark Evenson, RavenPack Marco Heisig, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany Ioanna Dimitriou, Igalia S.L., Spain, Germany Robert Smith Mattias Engdegård Marc Feeley, Université de Montréal, Canada Marc Battyani, FractalConcept Alan Ruttenberg, National Center for Ontological Research, USA Nick Levine, Ravenbrook Ltd, UK Ludovic Courtès, Inria, France Matthew Flatt, University of Utah, USA Irène Durand, Université Bordeaux 1, France Jay McCarthy, Brigham Young University, USA Ambrose Bonnaire-Sergeant, Cisco Christopher League, Long Island University, NY, USA Local Chair ~~~~~~~~~~~ Breanndán Ó Nualláin, Machine Learning Programs, Nederlands -- Resistance is futile. You will be jazzimilated. Lisp, Jazz, Aïkido: http://www.didierverna.info

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