*To*: seminar-16421 at dagstuhl.de, gdr.gpl at imag.fr, gt-verif at gdr-im.fr, isabelle-users at cl.cam.ac.uk*Subject*: [isabelle] PxTP 2017: Call for Papers*From*: dubois <catherine.dubois at ensiie.fr>*Date*: Fri, 14 Apr 2017 09:04:56 +0200*Organization*: ENSIIE*Reply-to*: catherine.dubois at ensiie.fr*User-agent*: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

(** We apologize for multiple copies of this email **) *Call for Papers, PxTP 2017* The Fifth International Workshop on Proof eXchange for Theorem Proving (PxTP) https://pxtp.github.io/2017/ 23-24 September 2017, Brasilia, Brazil associated with The Tableaux, FroCoS and ITP conferences *## Background* The PxTP workshop brings together researchers working on various aspects of communication, integration, and cooperation between reasoning systems and formalisms. The progress in computer-aided reasoning, both automated and interactive, during the past decades, made it possible to build deduction tools that are increasingly more applicable to a wider range of problems and are able to tackle larger problems progressively faster. In recent years, cooperation of such tools in larger verification environments has demonstrated the potential to reduce the amount of manual intervention. Examples include the Sledgehammer tool providing an interface between Isabelle and (untrusted) automated provers, and also collaboration of the HOL Light and Isabelle systems in the formal proof of the Kepler conjecture. Cooperation between reasoning systems relies on availability of theoretical formalisms and practical tools to exchange problems, proofs, and models. The PxTP workshop strives to encourage such cooperation by inviting contributions on suitable integration, translation and communication methods, standards, protocols, and programming interfaces. The workshop welcomes the interested developers of automated and interactive theorem proving tools, developers of combined systems, developers and users of translation tools and interfaces, and producers of standards and protocols. We are interested both in success stories and in descriptions of the current bottlenecks and proposals for improvement. *## Topics* Topics of interest for this workshop include all aspects of cooperation between reasoning tools, whether automatic or interactive. More specifically, some suggested topics are: * applications that integrate reasoning tools (ideally with certification of the result); * interoperability of reasoning systems; * translations between logics, proof systems, models; * distribution of proof obligations among heterogeneous reasoning tools; * algorithms and tools for checking and importing (replaying, reconstructing) proofs; * proposed formats for expressing problems and solutions for different classes of logic solvers (SAT, SMT, QBF, first-order logic, higher-order logic, typed logic, rewriting, etc.); * meta-languages, logical frameworks, communication methods, standards, protocols, and APIs related to problems, proofs, and models; * comparison, refactoring, transformation, migration, compression and optimization of proofs; * data structures and algorithms for improved proof production in solvers (e.g. efficient proof representations); * (universal) libraries, corpora and benchmarks of proofs and theories;

* engineering aspects of proofs (e.g. granularity, flexiformality, persistence over time); * proof certificates; * proof checking; * mining of (mathematical) information from proofs (e.g. quantifier instantiations, unsat cores, interpolants, ...); * reverse engineering and understanding of formal proofs; * universality of proofs; * origins and kinds of proofs (e.g. (in)formal, automatically generated, interactive, ...) * Hilbert's 24th Problem (i.e. what makes a proof better than another?); * social aspects (e.g. community-wide initiatives related to proofs, cooperation between communities, the future of (formal) proofs); * applications relying on importing proofs from automatic theorem provers, such as certified static analysis, proof-carrying code, or certified compilation; * application-oriented proof theory; * practical experiences, case studies, feasibility studies; *## Submissions* Researchers interested in participating are invited to submit either an extended abstract (up to 8 pages) or a regular paper (up to 15 pages). Submissions will be refereed by the program committee, which will select a balanced program of high-quality contributions. Short submissions that could stimulate fruitful discussion at the workshop are particularly welcome. We expect that one author of every accepted paper will present their work at the workshop. Submitted papers should describe previously unpublished work, and must be prepared using the LaTeX EPTCS class (http://style.eptcs.org/). Papers will be submitted via EasyChair, at the PxTP'2017 workshop page (https://easychair.org/my/conference.cgi?a=12750890;welcome=1;conf=pxtp2017). Accepted regular papers will appear in an EPTCS volume. *## Important Dates* * Abstract submission: Monday, 12 June 2017 * Paper submission: Monday, 19 June 2017 * Notification: Friday, 7 July 2017 * Camera ready versions due: Friday, 21 July 2017 * Workshop: 23-24 September 2017 *## Invited Speakers* * Gilles Dowek (INRIA) * Cesare Tinelli (The University of Iowa) *## Program Committee* * Catherine Dubois (ENSIIE-Samovar), co-chair * Bruno Woltzenlogel Paleo, co-chair * Christoph BenzmÃller (Freie UniversitÃt Berlin) * Jasmin Christian Blanchette (INRIA Nancy & LORIA) * Hans De Nivelle (Institute of Computer Science, University of Wroclaw) * Pascal Fontaine (Loria, INRIA, University of Lorraine) * StÃphane Graham-Lengrand (CNRS - INRIA - Ecole Polytechnique) * Hugo Herbelin (INRIA) * Olivier Hermant (MINES ParisTech) * Cezary Kaliszyk (University of Innsbruck) * Guy Katz (Stanford University) * Chantal Keller (LRI, UniversitÃ Paris-Sud) * Tomer Libal (INRIA) * Mariano Moscato (National Institute of Aerospace) * Vivek Nigam (Universidade Federal da ParaÃba) * Andrei Paskevich (UniversitÃ Paris-Sud, LRI) * Florian Rabe (Jacobs University Bremen) * Andrew Reynolds (University of Iowa) * Stephan Schulz (DHBW Stuttgart) * Geoff Sutcliffe (University of Miami) * Josef Urban (Czech Technical University in Prague) * Tjark Weber (Uppsala University) * Akihisa Yamada (University of Innsbruck) *## Previous PxTP Editions* * PxTP 2011 (http://pxtp2011.loria.fr/), affiliated to CADE-23 * PxTP 2012 (http://pxtp2012.inria.fr/), affiliated to IJCAR 2012 * PxTP 2013 (http://www.cs.ru.nl/pxtp13/), affiliated to CADE-24 * PxTP 2015 (http://pxtp15.lri.fr/), affiliated to CADE-25 -- Catherine DUBOIS, professor ENSIIE, lab. Samovar (UMR 5157)

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