Schedule and speakers Archive Organizers

This weekly seminar will cover topics related to point distributions, potential and discrepancy theory, and adjacent areas. The target audience is young researchers working in the listed directions, but everyone is welcome! Please share this information with anyone interested.

We will meet on Wednesdays, at 10am CST/11am EST/5pm CET. To join the seminar via Zoom, follow the link. It becomes active half an hour before the meeting. To join our mailing list, go here.

Previous talks are available in the Archive.

Coming up


  • Feb 3
    David Garcı́a-Zelada (Aix-Marseille U)
    A large deviation principle for empirical measures
    The main object of this talk will be a model of $n$ interacting particles at equilibrium. I will describe its macroscopic behavior as $n$ grows to infinity by showing a Laplace principle or, equivalently, a large deviation principle. This implies, in some cases, an almost sure convergence to a deterministic probability measure. Among the main motivating examples we may find Coulomb gases on Riemannian manifolds, the eigenvalue distribution of Gaussian random matrices and the roots of Gaussian random polynomials. This talk is based on arXiv:1703.02680.

    Paper: [arXiv]

  • Feb 10
    Arno Kuijlaars (KU Leuven)
    The spherical ensemble with external sources
    The talk is based on joint work with Juan Criado del Rey.
    We study a model of a large number of points on the unit sphere under the influence of a finite number of fixed repelling charges. In the large n limit the points fill a region that is known as the droplet. For small external charges the droplet is the complement of the union of a number of spherical caps, one around each of the external charges. When the external charges grow, the spherical caps will start to overlap and the droplet ondergoes a non-trivial deformation.
    We explicitly describe the transition for the case of equal external charges that are symmetrically located around the north pole. In our approach we first identify a motherbody that, due to the symmetry in the problem, will be located on a number of meridians connecting the north and south poles. After projecting onto the complex plane, and undoing the symmetry, we characterize the motherbody by means of the solution of a vector equilibrium problem from logarithmic potential theory.

    Paper: [arXiv]


  • Schedule and speakers



    The schedule is given in the local time for CST (Chicago) / EST (New York) / CET (Paris, Berlin) time zones; during daylight saving time it remains 10am/11am/5pm, respectively.

    Date Time Speaker Affiliation Title
    Feb 3 10am CST/11am EST/5pm CET David Garcı́a-Zelada Aix-Marseille U A large deviation principle for empirical measures
    Feb 10 10am CST/11am EST/5pm CET Arno Kuijlaars KU Leuven TBA
    Feb 17 10am CST/11am EST/5pm CET Alex Iosevich U of Rochester TBA
    Feb 24 10am CST/11am EST/5pm CET Kasso Okoudjou Tufts U TBA
    Mar 3 10am CST/11am EST/5pm CET Mircea Petrache PUC Chile TBA
    Mar 10 10am CST/11am EST/5pm CET Yeli Niu U of Alberta TBA
    Daylight Saving Time in the US
    Mar 17 *12pm CDT/1pm EDT/6pm CET Xuemei Chen UNC Wilmington TBA
    Daylight Saving Time in Europe
    Apr 7 10am CDT/11am EDT/5pm CEST Woden Kusner U of Georgia TBA
    May 12 TBA William Chen Macquarie U TBA
    May 19 10am CDT/11am EDT/5pm CEST Johann Brauchart TU Graz TBA

    Organizers


    Ryan Matzke     U of Minnesota     matzk053@umn.edu
    Tetiana Stepaniuk     Universität zu Lübeck     stepaniuk@math.uni-luebeck.de
    Alex Vlasiuk     Florida State     ovlasiuk@fsu.edu

    Previously: Damir Ferizović     TU Graz     damir.ferizovic@math.tugraz.at