About me

My Name is Vincent Levorato, and I am a french Researcher in Computer Sciences

I am a doctor in Computer Sciences who is mainly interested in Complex Systems Modeling, and Machine Learning.
I'm working at OCTO Technology company in the Big Data Analytics team, and I am also an associate researcher in the LIFO laboratory (Constraints and Machine Learning team). My principal Machine Learning "hobby'' is unsupervised learning, with sometimes a touch of graph theory.
Concerning education, I was teaching at exia.cesi engineer computer sciences school, and was the national head for Research exposure and Sciences school program. I now give training sessions at Octo Academy.
I received my PhD in Computer Sciences in 2008 from University Paris Vincennes-St Denis at the EPHE-Sorbonne LaISC laboratory after making my previous formation at University of Reims.

Academic projects

For my enterprise projects, see the projects section on my LinkedIn profile.


PretopoLib is a JAVA library implementing all the mathematical concepts of pretopology. Pretopology is a mathematical theory for analysis, modeling and simulation in several domains: human and social sciences, game theory, graph theory extension, networks, discrete spaces, GIS. It allows the elaboration of powerful tools and ensures the follow-up of step-by-step processes like dilatation, alliance, pseudo-closure, closure, or acceptability.


AGAPE library

This work is related to the AGAPE ANR project (FPT and exact graph algorithms) which objective is to develop new techniques to solve exactly NP-hard problems on graphs, and which is funded by the French National Research Agency. I worked as an research engineer to implement and validate some algorithms developed in this project. It is an open source Java implementation of exponential or parametrized graph algorithms of the literature.


SERVEUR project

This project, supported by the CITERES lab, is a regional research program (Centre) which objective is to identify in an urban context the impact of open spaces, for both people and authorities. This work intends to initiate a process to reproduce, characterize, and evaluate the socio-economic benefits of urban crossing in a mathematical model dealing with economic, environmental and social aspects. This action research project, which aims multidisciplinary, brings together geographers, planners, ecologists, sociologists, economists, mathematicians, computer scientists and geologists.


InnovENT-E project

The InnovENT-E project aim is to develop through dedicated training, the capacity of French SMEs to innovate, but also to expand internationally. This project has recently won French future investments dedicated to excellence in innovative training initiatives (IDEFI). Thus, gathering resources needs to have methods to describe a shared object and to validate the interest of its sharing. This is the subject of the InnovENT-E certification. It comes in three levels (Listed, Certified and Certified Plus). Two modules of mine have achieved the "Certified Plus", underneath the title "Design of an innovative product".



Publications preceded by a star (*) have the authors listed in alphabetical order, other publications are ranking authors by participation.


Z.T. Belmandt. Basics of Pretopology, Hermann, 155 pages, ISBN : 978 27056 8077, 2011

Z.T. Belmandt is a collective name for a group of scientists working on Pretopology namely Marcel Brissaud, Michel Lamure, Jean-Jacques Milan, Jean Paul Auray, Nicolas Nicoloyannis, Gérard Duru, Michel Terrenoire, Daniel Tounissoux, Djamel Zighed, Stéphane Bonnevay, Le Thanh Van, Marc Bui, Soufian Ben Amor and Vincent Levorato.
Pretopology theory relies on the statement that the axiomatic of mathematical topology is too strong to model the phenomena of social sciences. This axiomatic has to be reconsidered to give birth to a theory that is adapted to data issued from these fields of expertise, better than trying to force data to fit to an existing and inadequate theory. This book is the first English revised version of a first book, published in French, which is planned to be the first of a series dedicated to the whole set of results obtained in Pretopology: continuity, connectedness, associated metric... Many applications of Pretopology were conducted in various fields: economy with the structural analysis of a economy, game theory with the study of the dynamics of coalitions in cooperative games, sociology with analysis of social networks, data analysis with the construction of clustering algorithms, pattern recognition with digital image analysis as in mathematical morphology, etc.



V. Levorato. Modeling and Measures of Groups in Social Networks., Journal of Complex Systems, Hindawi Publishing Corporation, Article ID 354385, 2014.

V. Levorato, T. V. Le, M. Lamure et M. Bui. Classification Prétopologique Basée Sur La Complexité De Kolmogorov. Studia Informatica Universalis Vol. 7.1 - pages 199—222, éditions HERMANN, 2009.

International Conferences

Guillaume Cleuziou, Davide Buscaldi, Vincent Levorato, Gaël Dias and Christine Largeron. QASSIT: A Pretopological Framework for the Automatic Construction of Lexical Taxonomies from Raw Texts, International Workshop on Semantic Evaluation (SEMEVAL 2015), 2015, Denver, United States. 2015.

(*) D. Buscaldi, G. Cleuziou, G. Dias and V. Levorato. A Pretopological Framework for Automatic Construction of Semantic-Lexical Structures from Texts, In Proceedings of the 20th ACM Conference on Information and Knowledge Management (CIKM'2011), p. 2453-2456, Glasgow, UK, 2011.

V. Levorato and C. Petermann. Detection of communities in directed networks based on strongly p-connected components, In Proceedings of the 3rd Computational Aspects of Social Networks (CASoN'2011), p. 211-216, Salamanca, Spain, 2011.

(*) D. Buscaldi, G. Cleuziou, G. Dias and V. Levorato. A Pretopological Framework for Automatic Construction of Semantic-Lexical Structures from Texts, In Proceedings of the 20th ACM Conference on Information and Knowledge Management (CIKM'2011), p. 2453-2456, Glasgow, UK, 2011.

V. Levorato. Modeling Groups in Social Networks, In Proceedings of the 25th European Conference on Modelling and Simulation (ECMS'2011), pages 129-134, Krakow, Poland, 2011.

V. Levorato and M. Bui. Data structures and algorithms for pretopology : the java based software library pretopolib, In Proceedings of the 8th International Conference on Innovative Internet Community Systems, pages 122-134, IEEE, Schoelcher, Martinique, 2008.

V. Levorato and M. Bui. Modeling Complex Dynamics of Distributed Communities of the Web with Pretopology

Proceedings of the 10th International Conference on Innovative Internet Community Systems (I2CS’2010), Jubilee Edition 2010, Chapter 5, pages 306-320, Bangkok, Thaïland, June 2010, ISBN 978-3-88579-259-8, LNI 165 GI 2010.
Proceedings of the Innovative Internet Community Systems Conference, LNCS, Munich, Germany, June 2007.

S. BenAmor, V. Levorato, and I. Lavallée. Generalized percolation processes using pretopology theory. In Proceedings of the IEEE International Conference Research, Innovation and Vision of the Future (RIVF’07), pages 130-134, IEEE, Hanoï, Vietnam, 2007.

International Workshops

V. Levorato and J.-L. Yengué. Agent-based Modelling of the Ecosystem Services Diffusion through Urban Green Spaces, In Toward Integrated Modelling Of Urban Systems Symposiumw, Lyon, France, 2014.

V. Levorato. Core decomposition in Directed Networks: Kernelization and Strong Connectivity, In Proceedings of the 5th Workshop on Complex Networks (CompleNet'14), pages 129-140, Springer International Publishing, Bologna, Italy, 2014.

(*) V. Levorato and M. Senot. Discrete Signal Machines via Preotpology - one step from signal machines to cellular automata, In Proceedings of the 2nd Workshop on Non-Classical Models of Automata and Applications (NCMA'2010), pages 127-140, Jena, Germany, 2010.

National Conferences

A. Barhoumi, V. Levorato, N. Dugué, and N. Camelin. "L’important c’est de participer" : positive #ironie. Analyse de sentiments et détection de l’ironie Les systèmes du LIUM et d’OCTO, Atelier DEFT(Défi Fouille de Textes) @TALN/RECITAL 2017, pages 42-54, Orléans, France, 2017.

V. Levorato , M. Lutz. and M. Lagacherie. Défi EGC 2017: Modélisation Cost-Sensitive et Enrichissement de données, Conférence Internationale Francophone sur l'Extraction et la Gestion des Connaissances (EGC’2017), pages 45-56, Grenoble, France, 2017.

V. Levorato and M. Lutz. Analyse de processus métier pour la détection d'anomalies: approche non-supervisée appliquée au secteur de l’assurance, Francophone international conference AAFD & SFC, Marrakech, Morocco, 2016.

F. Andriamasinoro and V. Levorato. Appréciation de l’intérêt du secteur minier pour les SMA pour l’analyse prospective du marché des métaux stratégiques, 22èmes Journées Francophones sur les Systèmes Multi-Agents (JFSMA), Loriol-sur-Drôme, France, 2014.

C. Petermann, V. Levorato and M. Bui. Classification unilatéralement-connexe prétopologique : une extension de la librairie PretopoLIB, 3ème séminaire de Veille Stratégique, Scientifique et Technologique (VSST'12), Ajaccio, France, 2012.

(*) D. Buscaldi, G. Cleuziou, G. Dias et V. Levorato . Exploitation de l'asymétrie entre termes pour l'extraction automatique de taxonomies à partir de textes, Conférence Internationale Francophone sur l'Extraction et la Gestion des Connaissances (EGC’2012), pages 345-346, Revue des Nouvelles Technologies de l'Information, HERMANN, Bordeaux, France, 2012.

(*) G. Cleuziou, G. Dias et V. Levorato. Acquisition de structures lexico-sémantiques à partir de textes : un nouveau cadre de travail fondé sur une structuration prétopologique Conférence Internationale Francophone sur l'Extraction et la Gestion des Connaissances (EGC’2011), pages 107~118, Brest, France, Janvier 2011.

(*) G. Cleuziou, G. Dias et V. Levorato. Modélisation Prétopologique pour la Structuration Sémantico-Lexicale 17èmes rencontres de la Société Francophone de Classification (SFC'2010), La Réunion, 2010.

V. Levorato. Une méthode mixte d’analyse d’un réseau social: classification prétopologique et centralité d’intermédiarité The 1st Workshop on Web Social at Conference Extraction et Gestion des Connaissances’2010 - Hammamet, Tunisie, Janvier 2010.

V. Levorato, T. V. Le, M. Lamure et M. Bui. Distance de compression et classification prétopologique XVIèmes rencontres de la Société Francophone de Classification - Grenoble, France, Septembre 2009.


(*) P. Berthomé, J.F. Lalande and V. Levorato. Implementation of exponential and parametrized algorithms in the AGAPE project, technical report, LIFO, 2012.

V. Levorato. PretopoLib, Dépôt de logiciel à l’Agence pour la Protection des Programmes, France, 2008.

Conferences on abstract, Short articles and Invitations

V. Levorato. PretopoLib: la librairie JAVA de la Prétopologie Session Démonstration de Logiciels de la Conférence Extraction et Gestion des Connaissances’2010 - Hammamet, Tunisie, Janvier 2010.

V. Levorato et T. V. Le. Classification prétopologique basée sur la complexité de Kolmogorov The 1st Workshop on Topological learning at Conference Extraction et Gestion des Connaissances’09 - Strasbourg, France, Janvier 2009.

V. Levorato et M. Ahat. Modélisation De La Dynamique Des Réseaux Complexes Associée À La Prétopologie. Congrès de la ROADEF, Clermont-Ferrand, France, Février 2008.





Addresses: LIFO University of Orléans,
6 rue Léonard de Vinci, F-45067 Orléans
OCTO Technology,
34 avenue de l'Opéra, F-75002 Paris