[isabelle] 7th International Workshop on Proof eXchange for Theorem Proving (PxTP) - Second CFP

            Call for Papers, PxTP 2021

       The Seventh International Workshop on
     Proof eXchange for Theorem Proving (PxTP)


               21 July 2021, online

     associated with the CADE-28 conference

## 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 automatic and
  interactive, during the past decades, has 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 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 for exchanging 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 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 descriptions of 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
  * 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
  * 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
  * alignment of diverse logics, concepts and theories across systems
    and libraries;
  * 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 (i.e. interoperability of proofs between
    different proof calculi);
  * origins and kinds of proofs (e.g., (in)formal, automatically
    generated, interactive, ...)
  * Hilbert's 24th Problem (i.e. what makes a proof better than
  * 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'2021 workshop page
  Accepted regular papers will appear in an EPTCS volume.

## Important Dates

  * Abstract submission: April 21, 2021
  * Paper submission: April 28, 2021
  * Notification: May 26, 2021
  * Camera ready versions due: June 16, 2021
  * Workshop: July 11, 2021 (online)

## Invited Speakers


## Program Committee

  * Haniel Barbosa (Universidade Federal de Minas Gerais (UFMG), Belo
    Horizonte, Brazil)
  * Denis Cousineau (Mitsubishi, France)
  * Stefania Dumbrava (ENSIIE, France)
  * Katalin Fazekas (TU Wien, Austria)
  * Mathias Fleury (Johannes Kepler University Linz, Austria), co-chair
  * Predrag Janičić (University of Belgrade, Serbia)
  * Chantal Keller (LRI, Université Paris-Saclay, France), co-chair
  * Aina Niemetz (Stanford University, USA)
  * Jens Otten (University of Oslo, Norway)
  * Giselle Reis (CMU-Qatar, Qatar)
  * Geoff Sutcliffe (University of Miami, USA)
  * François Thiré (Nomadic Labs, France)
  * Sophie Tourret (Max-Planck-Institut für Informatik, Germany)
  * Josef Urban (Czech Institute of Informatics, Czech Republic)

## Previous PxTP Editions

  * PxTP 2019 (http://pxtp.gforge.inria.fr/2019), affiliated to CADE-27
  * PxTP 2017 (https://pxtp.github.io/2017), affiliated to Tableaux
    2017, FroCoS 2017 and ITP 2017
  * PxTP 2015 (http://pxtp15.lri.fr), affiliated to CADE-25
  * PxTP 2013 (http://www.cs.ru.nl/pxtp13), affiliated to CADE-24
  * PxTP 2012 (http://pxtp2012.inria.fr), affiliated to IJCAR 2012
  * PxTP 2011 (http://pxtp2011.loria.fr), affiliated to CADE-23

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