Institut de Mathématiques de Marseille, UMR 7373




Rechercher


Accueil >

23 novembre 2018: 4 événements

Séminaire

  • Agenda ERC IChaos

    Du 1er au 30 novembre - Alexander BUFETOV

    Scientific collaboration with A.KLIMENKO & P.NIKITIN

    Résumé : Steklov Mathematical Institute of Moscow : to continue collaboration on convergence of spherical averages for group actions.
    Steklov Mathematical Institute of St.Petersburg : collaboration on Pfaffian point processes.
    http://www.mathnet.ru/php/seminars.phtml?presentid=22166&option_lang=rus

    Lieu : Moscow & St.Petersburg - Steklov Math. Institute

    Exporter cet événement

En savoir plus : Agenda ERC IChaos

  • Séminaire Statistique

    Du 23 novembre 08:30 au 26 novembre 16:00 - WORKSHOP : Young Bayesians and Big Data for Social Good - CIRM

    Séminaire Statistique

    Résumé : CIRM - Jean-Morlet Chair -
    Kerrie MENGERSEN - Pierre PUDLO -
    Semester on "Bayesian Modelling and Analysis of Big Data :
    https://www.chairejeanmorlet.com/2018-2-mengersen-pudlo-1911.html

    Lieu : CIRM Luminy

    Exporter cet événement

    En savoir plus : Séminaire Statistique

  • Séminaire Teich

    Vendredi 23 novembre 11:00-12:00 - Ville SALO - University of Turku

    Universal groups of cellular automata

    Résumé : The full shift is the topological dynamical system of bi-infinite sequences over a finite alphabet under the shift map. Its automorphism group, the group of (reversible) cellular automata, has a rich family of finitely-generated subgroups, including all finite, f.g. abelian and f.g. free groups, and several groups with undecidable torsion problem. Many closure properties are also known for this family, such as closure under direct products and free products. The group itself is not finitely-generated.
    Nevertheless, we show that there is a finitely-generated subgroup that is universal, in the sense that it contains an embedded copy of every other finitely-generated subgroup.

    JPEG - 15.9 ko
    Ville SALO

    Lieu : FRUMAM - Aix-Marseille Université - Site St Charles
    3, place Victor Hugo - case 39
    13331 MARSEILLE Cedex 03

    Exporter cet événement
    Document(s) associé(s) :

    En savoir plus : Séminaire Teich

  • Séminaire Probabilités et Statistique

    Vendredi 23 novembre 11:00-12:00 - Nina HOLDEN - ETH Zurich

    Natural measures on random fractals

    Résumé : Several fractals that arise as the scaling limit of statistical physics models come equipped with a natural measure. This measure can often be defined equivalently in multiple ways : axiomatically, via Minkowski content, or as the limit of counting measure for the discrete model. We study such measures for the Schramm-Loewner evolution, percolation pivotal points, and various fractals in the geometry of Liouville quantum gravity. Based on joint works with subsets of Bernardi, Lawler, Li, and Sun.

    Lieu : CMI, salle de séminaire R164 (1er étage) - I2M - Château-Gombert
    39 rue Frédéric Joliot-Curie
    13453 MARSEILLE cedex 13

    Exporter cet événement
    Document(s) associé(s) :

    En savoir plus : Séminaire Probabilités et Statistique

  • 23 novembre 2018: 2 événements

    Manifestation scientifique

    • Manifestations scientifiques (colloques, écoles,...)

      Du 19 au 23 novembre - WORKSHOP AND DOCTORAL SCHOOL

      iTWIST : international Traveling Workshop on Interactions between low-complexity data models and Sensing Techniques

      Résumé : WORKSHOP AND DOCTORAL SCHOOL,
      4th edition.
      -
      The advent of increased computing capabilities, along with recent theoretical and numerical breakthroughs in the fields of signal processing, computational harmonic analysis, inverse problem solving, high-dimensional statistics and convex optimization, have boosted interactions between low-complexity data models (e.g., sparse or low-rank data models) and novel data sensing techniques.
      In a nutshell, low-complexity data models aim at capturing, modeling and exploiting “just the information you need” in the ubiquitous data deluge characterizing any scientific or technological achievements. High dimensional objects can be thus reconstructed using little information. However, further developments and novel ideas are still required to meet new challenges, especially for efficiently dealing with complex data structures of "real life" applications and for interconnecting such models with other theoretical and applied fields.
      ​The iTWIST workshop aims at fostering collaboration between international scientific teams for developing new theories, applications and generalizations of low-complexity models. This is why this event emphasizes dissemination of ideas through both specific oral/poster presentations and free discussions.
      For this edition, ITWIST will be divided into two parts, a 2-day doctoral school, followed by the actual workshop for three days.
      -
      Sujets :
      - Application of low-complexity models in non-convex/non-linear inverse problems such as phase retrieval, blind deconvolution, blind calibration, or dictionary learning.
      - Machine learning, deep learning, compressive statistical learning and generalized high-dimensional inference of low-complexity statistical models.
      - Optimization methods for recovering low-complexity data representations (e.g., low-rank or tensor decomposition).
      - Information theory, high-dimensional (convex) geometry and randomness.
      - Novel definition of low-complexity models (discrete-valued signals, co-sparsity, mixed/group norm, model-based, tensor/manifold models).
      - Sensing and processing of low-complexity signals on manifolds and graphs.
      - Complexity and accuracy tradeoffs in numerical methods/optimization.
      - Simulation and/or developments of novel electronic/optical compressive sensors.
      -
      Organizing Committee :
      Sandrine Anthoine (Aix-Marseille Université, France), General Chair
      Yannick Boursier (CPPM, France)
      Laurent Jacques (UCLouvain, Belgium)
      Christine De Mol (Université Libre de Bruxelles, Belgium)
      -
      Partenaires :
      - Aix-Marseille Université (FIR colloques AMU)
      - Centre International de Rencontres Mathématiques (CIRM)
      - Centre National de la Recherche Scientifique (CNRS)
      - ED184
      - FNRS
      - GDR MIA
      - GDR MOA
      - IN2P3
      - Institut de Mathématiques de Marseille (I2M)
      - LabEx Archimède
      - LabEx CARMIN
      -

      Site web du workshop
      JPEG - 28.3 ko

      Autre lien : CIRM

      Lieu : CIRM - 163 avenue de Luminy
      Case 916
      13288 MARSEILLE - Cedex 9
      France

      Exporter cet événement
      Document(s) associé(s) :

      En savoir plus : Manifestations scientifiques (colloques, écoles,...)

    • Manifestations scientifiques (colloques, écoles,...)

      Du 23 au 26 novembre - WORKSHOP

      Young Bayesians and Big Data for Social Good

      Résumé : WORKSHOP,
      dans le cadre de la Chaire Jean Morlet
      -
      Statistiques bayésiennes à l’ère du Big Data.
      -
      There is increasing international interest and engagement in the concept of ’data and statistics for social good’, with volunteers and organisations working on issues such as human rights, migration, social justice and so on. There is commensurate international interest in Bayesian modelling and computation, particularly in the area of Big Data.
      The purpose of this workshop is to build on an emerging endeavour to bring these two areas of activity together. Participants in the workshop will share research into Bayesian methods and big data for social good, as well as discuss related problems that might be addressed using Bayesian approaches. In addition to formal presentations, participants will form collaborative groups to work on new problems and present their findings at a final session on the last day of the workshop which overlaps with a more general conference on ’Bayesian Statistics in the Big Data Era’.
      The workshop will provide opportunities for early career researchers around the world who are interested in issues of social good to form lifelong international networks for their immediate and future careers. The semi-structured environment will encourage and progress new research opportunities. The anticipated outputs of the workshop include outlines of journal articles and/or chapters of a new book on this topic, as well as a starting place for practical solutions to problems posed. ​
      -
      Organisateurs :
      - Kerrie Mengersen (QUT Brisbane)
      - Denys Pommeret (I2M, Marseille)
      - Pierre Pudlo (I2M, Marseille)
      - Christian P. Robert (Université Paris-Dauphine)
      -
      Partenaires :
      - LabEx CARMIN
      - Ville de Marseille
      -

      Site web du workshop
      JPEG - 33.9 ko

      Autre lien : CIRM

      Lieu : CIRM - 163 avenue de Luminy
      Case 916
      13288 MARSEILLE - Cedex 9
      France

      Exporter cet événement
      Document(s) associé(s) :

      En savoir plus : Manifestations scientifiques (colloques, écoles,...)