Olivier Pons
Maître de Conférences
Conservatoire des Arts et Métiers
Département Informatique
Équipe SYS du laboratoire Cédric
Stages 2024-2025
Très bientôt (début novembre)
Maître de Conférences
Conservatoire des Arts et Métiers
Département Informatique
Équipe SYS du laboratoire Cédric
Très bientôt (début novembre)
Pour une liste à jours
[1] |
Jean-Ferdinand
Susini, Olivier Pons, Nolwenn
Guedin et Catherine Thevenot.
Danse-doigts, jeu de motricité
fine,
Actes du 9 ème congrès sur les
aides techniques pour les personnes
Handicap 2016, Juin 2016, pp.6, Paris France,
[ .pdf ]
Ce document décrit la conception, la reéalisation et l’expérimentation de «Danse-doigts», une application ludo-thérapeutique à destination d'enfants hémiparétiques. L'objectif de ce logiciel est double : permettre d'entraîner leur motricité fine sur tablette puis d'étudier l'effet de cet entraînement sur leurs compétences numériques (dénombrement, calcul,...). La population visée, comme l'objectif d'évaluation des compétences de calcul, ont influencé la conception. Le développement logiciel se base sur des technologies Web standard mais repose sur une bibliothèque de programmation parallèle en javascript. Applications et bibliothèques sont disponibles gratuitement et s'installent très facilement sur la plupart des tablettes tactiles. |
[2] |
Evelyne Contejean, Pierre Courtieu, Julien Forest, Olivier Pons, and Xavier
Urbain.
Automated certified proofs with cime3.
In Manfred Schmidt-Schauß, editor, Proceedings of the 22nd
International Conference on Rewriting Techniques and Applications, RTA
2011, May 30 - June 1, 2011, Novi Sad, Serbia, volume 10 of LIPIcs,
pages 21--30. Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 2011.
[ bib |
DOI |
http |
.pdf ]
We present the rewriting toolkit CiME3. Amongst other original features, this version enjoys two kinds of engines: to handle and discover proofs of various properties of rewriting systems, and to generate Coq scripts from proof traces given in certification problem format in order to certify them with a sceptical proof assistant like Coq. Thus, these features open the way for using CiME3 to add automation to proofs of termination or confluence in a formal development in the Coq proof assistant. |
[3] |
Évelyne Contejean, Pierre Courtieu, Julien Forest, Olivier Pons, and Xavier
Urbain.
Automated certified proofs with cime3.
Technical Report 2044, CEDRIC laboratory, CNAM-Paris, France, Feb
2011.
[ bib |
.pdf ]
A preliminary version of [1]. |
[4] |
Pierre Courtieu, Gladys Gbedo, and Olivier Pons.
Improved matrix interpretation.
In Jan van Leeuwen, Anca Muscholl, David Peleg, Jaroslav Pokorný,
and Bernhard Rumpe, editors, SOFSEM, volume 5901 of Lecture Notes
in Computer Science, pages 283--295. Springer, 2010.
[ bib |
.pdf ]
We present a new technique to prove termination of Term Rewriting Systems, with full automation. A crucial task in this context is to find suitable well-founded orderings. A popular approach consists in interpreting terms into a domain equipped with an adequate well-founded ordering. In addition to the usual interpretations: natural numbers or polynomials over integer/rational numbers, the recently introduced matrix based interpretations have proved to be very efficient regarding termination of string rewriting and of term rewriting. In this spirit we propose to interpret terms as polynomials over integer matrices. Designed for term rewriting, our generalisation subsumes previous approaches allowing for more orderings without increasing the search space. Thus it performs better than the original version. Another advantage is that, interpreting terms to actual polynomials of matrices, it opens the way to matrix non linear interpretations. This result is implemented in the CiME3 rewriting toolkit |
[5] |
Evelyne Contejean, Andrey Paskevich, Xavier Urbain, Pierre Courtieu, Olivier
Pons, and Julien Forest.
A3pat, an approach for certified automated termination proofs.
In John P. Gallagher and Janis Voigtländer, editors, PEPM,
pages 63--72. ACM, 2010.
[ bib |
.pdf ]
Software engineering, automated reasoning, rule-based programming or specifications often use rewriting systems for which termination, among other properties, may have to be ensured. This paper presents the approach developed in Project A3PAT to discover and moreover certify, with full automation, termination proofs for term rewriting systems. |
[6] |
Pierre Courtieu, Gladys Gbedo, and Olivier Pons.
Matrix interpretations revisited.
In Alfons Geser and Johannes Waldmann, editors, Extended
Abstracts of the 10th International Workshop on Termination, WST'09, Leipzig,
Germany, page 4, Jun 2009.
[ bib |
.pdf ]
|
[6] |
Ivan Augé, Vincent Leligeour, and Olivier Pons.
A distribution and system compiler for handling heterogeneous
computer site.
Technical Report 1549, CEDRIC laboratory, CNAM-Paris, France, 01
2008.
[ bib |
.pdf ]
This document describes YaKa, a complete solution for deploying operating systems on large computer site. Unlike most existing tools Yaka is based on a compiled approach. It provides a language allowing to describe a computer site as a whole and at all levels: host hardware, systems to install on the hosts, links between host systems, software generation. Using this description a compiler generates automatically the systems to be installed for each host and generates the network installation servers. All generated systems are ready to use and fully operational on their first run. All systems are generated in a single operation so every component is generated with a complete knowledge of all the other components of the system and a complete knowledge of the network relationship between the hosts. This ensures the coherence of each piece of software with the other softwares of the system and with the environment of the host. By reducing the amount of components needing to be installed and the complexity of the startup scripts, this drastically decreases the duration of system installation and the duration of the boot. This allows to do statically a lot of verifications. This allows to group tools together to provide abstract services. The power of the language is also demonstrated by describing a complete source based Linux distribution. The efficiency and reliability have been demonstrated by its use for several years to manage the teaching network our postgraduate school.(10 servers, 100 clients with heterogeneous hardware, different operating systems and software). |
[8] |
Ivan Augé and Olivier Pons.
A service oriented compiler for operating systems.
Technical Report 1551, CEDRIC laboratory, CNAM-Paris, France, 01
2008.
[ bib |
.pdf ]
Most tools dedicated to system administration of local area network follow the same scheme. For each host they install an initial operating system and then update it using a package manager. The package managers run independently on the hosts, this makes difficult (even impossible) to create and maintain a stable environment in which multiple hosts coexist and cooperate. Furthermore, over time, the update process that upgrades, adds or suppress software results in instability of host systems. Finally, a package corresponds most often to a single software with a basic configuration which does not match to the network requirements. This article presents the YaKa framework which propose an orthogonal approach to this scheme in which the update feature almost disappears and is replaced by a very fast installation of a new clean system. All systems required in the network are generated all together by a compiler which has a complete view of the network. This general view allows to describe systems as a set of abstract services. A service groups one or several softwares and configures them for enabling a given functionality on one or several hosts. |
[9] |
Évelyne Contejean, Pierre Courtieu, Julien Forest, Olivier Pons, and Xavier
Urbain.
Certification of automated termination proofs.
Rapport scientifique 1185, Cedric, 2007.
[ bib |
.pdf |
.ps.gz ]
A preliminary version of [9]. |
[10] |
Evelyne Contejean, Pierre Courtieu, Julien Forest, Olivier Pons, and Xavier
Urbain.
Certification of automated termination proofs.
In Boris Konev and Frank Wolter, editors, FroCos, volume 4720
of Lecture Notes in Computer Science, pages 148--162. Springer, 2007.
[ bib |
.pdf ]
Nowadays, formal methods rely on tools of different kinds: proof assistants with which the user interacts to discover a proof step by step; and fully automated tools which make use of (intricate) decision procedures. But while some proof assistants can check the soundness of a proof, they lack automation. Regarding automated tools, one still has to be satisfied with their answers |
[11] |
Brigitte Grau, Gabriel Illouz, Laura Monceaux, Patrick Paroubek, Olivier Pons,
Isabelle Robba, and Anne Vilnat.
Frasques, le système du groupe lir, limsi.
In Atelier EQueR, Conférence (TALN'05), pages 85--88, June
2005.
[ bib |
.pdf |
.ps.gz ]
Le système FRASQUES qui a participé à l'évaluation EQueR est présenté ici en comparaison avec le système QUALC dédié à l'anglais. Ses Résultats sont commentés en une évaluation des différents modules est exposée. |
[12] |
Brigitte Grau, Anne-Laure Ligozat, Isabelle Robba, Anne Vilnat, Faîza El Kateb,
Gabriel Illouz, Laura Monceaux, Patrick Paroubek, and Olivier Pons.
De l'importance des synonymes pour la sélection de passages en
question-réponse.
In Conférence en Recherche d'Informations et Applications
(CORIA'05), pages 71--84, March 2005.
[ bib |
.pdf |
.ps.gz ]
Les systèmes de question-réponse développés actuellement adoptent pour la plupart et à peu de chose près le même type d'architecture que l'on peut schématiser en trois modules : l'analyse de la question, la sélection des documents, l'extraction de la réponse. Mais ce en quoi ils diffèrent, ce sont les outils (moteur d'indexation, analyseurs...) et les bases de connaissances qu'ils utilise nt. Pour chacun de ces systèmes, il est donc important d'évaluer l'apport de ces outils ou bases de connaissances. Dans le cadre de la campagne Equer (campagne d'évaluation des systèmes de question-réponse pour le français), notre système F RASQUES a produit deux jeux de résultats : l'un utilise des synonymes dans les b i-termes, l'autre pour les mono-termes aussi. La comparaison de ces deux tests e t l'étude d'un corpus plus large, en français et en anglais, permet de mesurer l'apport de ces connaissances sémantiques. |
[13] |
Catherine Dubois, Mathieu Jaume, Olivier Pons, and Virgile Prevosto.
L'atelier focal.
In Actes du Congrès AFADL'04, Approches Formelles dans
l'Assistance au Développement de Logiciels (Session Outils), Besancon,
France, June 2004.
[ bib |
.pdf |
.ps.gz ]
L'atelier FOCAL est un atelier intégré de construction modulaire de logiciels certifiés. Il permet l'écriture de modules constitués de déclarations, définitions, énoncés et preuves. Les déclarations peuvent être raffinées en définitions et les énoncés en preuves, par passage progressif de la spécification à l'implantation, à l'aide de mécanismes d'héritage, de redéfinition et d'instanciation de paramètres génériques. La compilation des modules développés avec l'atelier FOCAL produit un code exécutable OCaml et un développement formel Coq. |
[14] |
Gilles Barthe, Venanzio Capretta, and Olivier Pons.
Setoids in type theory.
Journal of Functional Programming, 13(2):261--293, 2003.
[ bib |
.pdf |
.ps.gz ]
Formalising mathematics in dependent type theory often requires to represent sets as setoids, i.e. types with an explicit equality relation. This paper surveys some possible definitions of setoids and assesses their suitability as a basis for developing mathematics. According to whether the equality relation is required to be reflexive or not we have total or partial setoid, respectively. There is only one definition of total setoid, but four different definitions of partial setoid, depending on four different notions of setoid function. We prove that one approach to partial setoids in unsuitable, and that the other approaches can be divided in two classes of equivalence. One class contains definitions of partial setoids that are equivalent to total setoids; the other class contains an inherently different definition, that has been useful in the modeling of type systems. We also provide some elements of discussion on the merits of each approach from the viewpoint of formalizing mathematics. In particular, we exhibit a difficulty with the common definition of subsetoids in the partial setoid approach. |
[15] |
Olivier Pons.
Generalization in type theory based proof assistants.
In Paul Callaghan, Zhaohui Luo, James McKinna, and Robert Pollack,
editors, TYPES, volume 2277 of Lecture Notes in Computer Science,
pages 217--232. Springer, December 2000.
[ bib |
.pdf |
.ps.gz ]
This paper describes a mechanism to generalize mathematical results in type theory based proof assistants. The proposed mechanism starts from a proved theorem or a proved set of theorems (a theory) and makes it possible to get less specific results that can be instantiated and reused in other contexts. |
[16] |
Gilles Barthe and Olivier Pons.
Type isomorphisms and proof reuse in dependent type theory.
In Furio Honsell and Marino Miculan, editors, FoSSaCS, volume
2030 of Lecture Notes in Computer Science, pages 57--71. Springer,
2001.
[ bib |
.pdf |
.ps.gz ]
We propose a theoretical foundation for proof reuse, based on the novel idea of a computational interpretation of type isomorphisms. |
[17] |
Yves Bertot, Olivier Pons, and Loïc Pottier.
Graphes de dépendance pour les démonstrateurs de théorèmes
intéractifs.
Technical Report RR-4052, Institut National de Recherche en
Informatique et en Automatique (INRIA), November 2000.
[ bib |
.pdf |
.ps.gz ]
We propose tools to visualize large proof developments as graphs of theorems and definitions where edges denote the dependency between two theorems. In particular, we study means to limit the size of graphs. Experiments have been done with the Coq theorem prover and the GraphViz and daVinci graph visualization suites. Keywords: Dependency, graphs, theorems, proof, Coq, GraphViz, daVinci, dot |
[18] |
Olivier Pons.
Proof engineering.
Rapport de recherche, Laboratoire CEDRIC-CNRAM, September 2000.
[ bib |
.pdf |
.ps.gz ]
The main purpose of this article is to present a panorama of tools for formal proof analysis and management. The proposed tools are based upon several notions of dependency. Our principal objective is to facilitate the development and the maintenance of theories in proofs assistants in order to improve the productivity of such systems' users. |
[19] |
Olivier Pons.
Proof generalization and proof reuse.
Technical Report 2000
[ bib ]
This paper presents some experiments about the notion of generalization in proof assistants based on proof theory. We propose a mechanism which, starting from a proved theorem, allows to get a less specific result that can be instantiated and reused in other contexts. |
[20] |
Olivier Pons.
Ingénierie de preuve.
In INRIA, editor, Actes des Journées francophones des langages
applicatifs 2000, pages 171 -- 186, Mont Saint-Michel, France, January 2000.
[ bib |
.pdf |
.ps.gz ]
This paper introduces a panorama of tools to analyse and to manage formal proofs. The goal of the proposed tools is to to facilitate the development and maintenance of theories in proof assistants and so to improve the productivity of the users of these systems. |
[21] |
Olivier Pons.
Conception et réalisation d'outils d'aide au développement
de grosses théories dans les systèmes de preuves interactifs.
PhD thesis, Conservatoire National des Arts et Métiers, Paris,
France, July 1999.
[ bib |
.pdf |
.ps.gz ]
Cette thèse s'inscrit dans un domaine de recherche dont l'objectif est le développement de systèmes interactifs d'aide à la démonstration, telque Coq, HOL ou PVS. Le but est de fournir des outils pour améliorer la productivité des utilisateurs de tels systèmes, lorsqu'ils sont engagés dans le développement de grandes théories mathématiques. Les outils proposés s'appliquent aux tâches de développement et de maintenance et sont basés sur différentes notions de dépendance. |
[22] |
Olivier Pons, Yves Bertot, and Laurence Rideau.
Notions of dependency in proof assistants.
In Electronic Proceedings of "User Interfaces for Theorem
Provers 1998", Sophia-Antipolis, France, July 1998.
[ bib |
.pdf |
.ps.gz ]
This article describes uses of dependencies in tools to maintain big proofs in interactive proof assistants. |
[23] |
Olivier Pons.
Undoing and managing a proof.
In Electronic Proceedings of "User Interfaces for Theorem
Provers 1997", Sophia-Antipolis, France, September 1997.
[ bib |
.pdf |
.ps.gz ]
In this paper we work in the area of proof script management. We study the dependencies between commands in a script and how they can be exploited in the undoing process. We present some problems that we have met in our implementation of proof managing tools in the CtCoq interface for the Coq System. |
[24] |
Olivier Pons.
Vers une formalisation de l'algèbre relationel en coq.
Rapport de dea, Université Pierre et Marie Curie - Paris 6, Paris,
France, September 1995.
[ bib |
.pdf |
.ps.gz ]
C'est complètement dépassé et j'ai un peu honte mais ça peut remonter le moral de ceux qui ont du mal en MASTER! |
[25] |
Ivan Augé and Olivier Pons.
Fokon; un système d'éxamination automatique, 2008.
[ bib |
.pdf ]
Cet article décrit Fokon, un logiciel qui automatise entièrement la correction, la notation et l'établissement de rapports d'examen. Ce logiciel est utilisé en production à l'ENSIIE depuis 2005. Le cahier des charges qui a conduit à sa conception ainsi que le fonctionnement global et la méthode de notation sont tour a tour présentés. |
[26] | Pierre Courtieu and Olivier Pons. Formalisation d'un cours de logique et de sémantique en coq, 2014. [ bib | http ] |