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Colloquia & Seminars


Current Seminars

Upcoming Seminars

  1. HDMP - Weekly Seminar (Part 1): Holomorphic quadratic differentials on graphs

    Location: MSRI: Simons Auditorium
    Speakers: Wai Yeung Lam (University of Luxembourg)

    In the classical theory, holomorphic quadratic differentials are tied to a wide range of objects, e.g. harmonic functions, minimal surfaces and Teichmüller space. We present a discretization of holomorphic quadratic differentials that preserves such a rich theory. We introduce discrete holomorphic quadratic differentials and discuss their connections to the surface theory and Teichmüller theory. On one hand, holomorphic quadratic differentials are related to discrete minimal surfaces via a Weierstrass representation. On the other hand, they arise from deformations of circle packings on surfaces with complex projective structures.

    Updated on Sep 12, 2019 04:23 PM PDT
  2. HDMP-Weekly Seminar (Part 2): Rauzy inductions and multidimensional continued fractions

    Location: MSRI: Simons Auditorium
    Speakers: Charles Fougeron (MSRI - Mathematical Sciences Research Institute)

    The Rauzy induction is the combinatorial counterpart of the Teichmuller flow. Its study is central in the proof of many of the dynamical results in Teichmuller dynamics such as the exponential mixing property, existence and unicity of an invariant measure of maximal entropy, ... After giving an introduction to this induction in the case of abelian and quadratic differentials, I will explain a generalization to multidimensional continued fractions, as well as a ergodicity criterion, and construction of invariant measures.  

    Updated on Sep 13, 2019 08:50 AM PDT
  3. MLA - Weekly Seminar (Part 1): Higher genera, singular manifolds, and microlocal analysis

    Location: MSRI: Simons Auditorium
    Speakers: Paolo Piazza (Università di Roma "La Sapienza'')

    The Atiyah-Singer index theorem expresses the index of the three fundamental geometric operators,
    i.e. the signature operator, the spin-Dirac operator and the Riemann-Roch operator, in terms of
    the L-genus, the A-roof genus and the Todd genus of the manifold. These genera have remarkable stability properties.
    One can define higher genera by taking the fundamental group and its cohomology into account and deep results of Kasparov, Connes, Moscovici and many others express these numbers in terms of the K-homology class [D] associated to these operators, information that is then crucial in studying the stability properties of the higher genera.
    In this talk I will begin by explaining this fascinating circle of ideas, together with its geometric applications, and then move on and give an answer to the following question: what of all this can be generalized to singular manifolds? As we shall see the answer depends heavily on microlocal analysis, at least for the first 2 examples.

    The results that I will present are scattered in papers with Albin-Leichtnam-Mazzeo, Botvinnik- Rosenberg, Bei.

    Updated on Sep 12, 2019 04:46 PM PDT
  4. MLA - Weekly Seminar (Part 2): Linear stability of slowly rotating Kerr spacetimes

    Location: MSRI: Simons Auditorium
    Speakers: Dietrich Hafner (Université Grenoble Alpes)

    In joint work with Peter Hintz and András Vasy, we study the asymptotic behavior of linearized gravitational perturbations of Schwarzschild and slowly rotating Kerr black hole spacetimes. We show that solutions of the linearized Einstein equation decay at an inverse polynomial rate to a stationary solution (given by an infinitesimal variation of the mass and angular momentum of the black hole), plus a pure gauge term. In this talk, I will describe the geometric background and
    the analytic setup of our result, including a discussion of gauge fixing. Our proof is based on a precise description of the resolvent of an associated wave equation on symmetric 2-tensors near zero energy.

    Updated on Sep 12, 2019 04:55 PM PDT
  5. MLA - Regular Seminar: Applications of FIOs to Configuration Set Problems

    Location: MSRI: Simons Auditorium
    Speakers: Allan Greenleaf (University of Rochester)

    According to a classical theorem of Steinhaus, if a subset E of d-dimensional Euclidean space
    has positive Lebesgue measure, then its difference set, E-E, contains a neighbourhood of the
    origin. Configuration set problems concern characterizing the sizes of collections of point
    configurations that arise among the points of a subset of Euclidean (or more general) spaces; there are versions in discrete geometry (Erd\"os-Purdy type problems) for sets with a large number N of points, as well as in continuous geometry (Falconer type problems) for fractals with some lower bound on their dimension. An example of the latter is a result of Mattila and Sj\"olin that if the Hausdorff dimension of E is >(d+1)/2, then the set of distances between points of E contains an open interval. I will discuss a general approach to results of this type using Fourier integral operators, giving positive results for a wide variety of geometries, and also discuss examples where it fails.
    This is joint work with Alex Iosevich and Krystal Taylor.

    Updated on Sep 12, 2019 04:59 PM PDT
  6. MLA Special Seminar - Geometrically finite Poincaré-Einstein metrics

    Location: MSRI: Simons Auditorium
    Speakers: Frederic Rochon (Université du Québec à Montréal)

    After reviewing the notion of geometrically finite hyperbolic metrics, I will explain how perturbing their conformal infinity yields new examples of complete Einstein metrics via the inverse function theorem. This is a joint work with Eric Bahuaud.

    Created on Sep 17, 2019 11:23 AM PDT
  7. MLA-Graduate Student Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  8. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:35 PM PDT
  9. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:38 PM PDT
  10. MLA - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:13 PM PDT
  11. MLA - Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:18 PM PDT
  12. MLA - Regular Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:35 PM PDT
  13. MLA-Graduate Student Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  14. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:35 PM PDT
  15. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:38 PM PDT
  16. MLA - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:13 PM PDT
  17. MLA - Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:18 PM PDT
  18. MLA - Regular Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:35 PM PDT
  19. MLA-Graduate Student Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  20. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:35 PM PDT
  21. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:38 PM PDT
  22. MLA - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:13 PM PDT
  23. MLA - Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:18 PM PDT
  24. MLA - Regular Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:35 PM PDT
  25. Microlocal Analysis and Spectral Theory: A Conference in Honor of Richard Melrose

    Location: UC Berkeley Math
    Speakers: Nalini Anantharaman (Université de Strasbourg), Yaiza Canzani (Harvard University), Semyon Dyatlov (University of California, Berkeley), Colin Guillarmou (Université de Paris XI (Paris-Sud)), Victor Guillemin (Massachusetts Institute of Technology), Peter Hintz (Massachusetts Institute of Technology), Gilles Lebeau (Université Nice Sophia-Antipolis), Laure Saint-Raymond, Peter Sarnak (Princeton University), Terence Tao (University of California, Los Angeles), Akshay Venkatesh (Institute for Advanced Study)

    This will be a conference on the wide range of topics aimed to inspire future directions and new applications of microlocal methods. 

    Updated on Jun 18, 2019 01:45 PM PDT
  26. MLA-Graduate Student Seminar

    Location: MSRI: Baker Board Room
    Created on Aug 26, 2019 02:41 PM PDT
  27. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:35 PM PDT
  28. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:38 PM PDT
  29. MLA - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:13 PM PDT
  30. MLA - Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:18 PM PDT
  31. MLA - Regular Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:35 PM PDT
  32. MLA-Graduate Student Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  33. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:35 PM PDT
  34. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:38 PM PDT
  35. MLA - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:13 PM PDT
  36. MLA - Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:18 PM PDT
  37. MLA - Regular Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:35 PM PDT
  38. MLA-Graduate Student Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  39. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:35 PM PDT
  40. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:38 PM PDT
  41. MLA - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:13 PM PDT
  42. MLA - Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:18 PM PDT
  43. MLA - Regular Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:35 PM PDT
  44. MLA-Graduate Student Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  45. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:35 PM PDT
  46. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:38 PM PDT
  47. MLA - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:13 PM PDT
  48. MLA - Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:18 PM PDT
  49. MLA - Regular Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:35 PM PDT
  50. MLA-Graduate Student Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  51. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:35 PM PDT
  52. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:38 PM PDT
  53. MLA - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:13 PM PDT
  54. MLA - Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:18 PM PDT
  55. MLA-Graduate Student Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  56. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:35 PM PDT
  57. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:38 PM PDT
  58. MLA - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:13 PM PDT
  59. MLA - Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:18 PM PDT
  60. MLA - Regular Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:35 PM PDT
  61. MLA-Graduate Student Seminar

    Location: MSRI: Baker Board Room
    Created on Aug 26, 2019 02:41 PM PDT
  62. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:35 PM PDT
  63. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 21, 2019 04:38 PM PDT
  64. MLA - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:13 PM PDT
  65. MLA - Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:18 PM PDT
  66. MLA - Regular Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 27, 2019 01:35 PM PDT

Past Seminars

  1. Seminar 5-Minute Talks

    Updated on Sep 04, 2019 02:45 PM PDT
  2. Seminar 5-Minute Talks

    Updated on Sep 04, 2019 02:45 PM PDT
  3. Seminar 5-Minute Talks

    Updated on Sep 04, 2019 02:45 PM PDT
  4. Seminar 5-Minute Talks

    Updated on Sep 04, 2019 02:45 PM PDT
There are more then 30 past seminars. Please go to Past seminars to see all past seminars.