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All Colloquia & Seminars

Current Seminars

Upcoming Seminars

  1. HDMP - Weekly Seminar: Spectral networks and invariants of saddle counting for quadratic and higher differentials

    Location: MSRI: Simons Auditorium
    Speakers: Pietro Longhi (ETH Zurich)

    Counts of special trajectories of quadratic differentials on Riemann surfaces are an example of Donaldson-Thomas invariants, they exhibit wall-crossing phenomena over the moduli space of differentials. I will describe a combinatorial construction of the Kontsevich-Soibelman invariant for this counting problem based on ribbon graphs of degenerate Jenkins-Strebel differentials. Time permitting, I will also sketch generalizations to motivic wall-crossing invariants, and to collections of k-differentials in the context of Hitchin systems.

    Updated on Oct 11, 2019 11:58 AM PDT
  2. MLA - Special Seminar: Global solutions to linear and semilinear Helmholtz, Klein-Gordon and Schr\"odinger equations

    Location: MSRI: Simons Auditorium
    Speakers: Andrew Hassell

    I will talk about recent work with Jesse Gell-Redman, Jacob Shapiro and Junyong Zhang on

    solving the semilinear Helmholtz equation on Euclidean, or more generally asymptotically conic spaces, 

    and ongoing work on extending this result to the semilinear Klein-Gordon and time dependent Schr\"odinger

    equations. 

     

    The proof relies on finding suitable pairs of Hilbert spaces between which the

    operator acts invertibly, such that the range space has suitable algebra (multiplicative) properties. 

    Similar work has been done recently by Hintz-Vasy and Gell-Redman-Haber-Vasy. The difference in the

    present work is that the analysis at the boundary (`infinity') takes place in the scattering calculus, rather than

    the b-calculus. 

     

    Created on Oct 14, 2019 04:02 PM PDT
  3. MLA - Special Seminar (#2) - Microlocal aspects of topological insulators

    Location: MSRI: Simons Auditorium
    Speakers: Alexis Drouot (Columbia University)

    In this talk, I study a PDE that models interface effects between insulators. It is a Schrodinger equation with periodic asymptotics (the bulk), away from a strip (the interface). I will prove the bulk-edge correspondence. At the physical level, this index-like theorem predicts that the interface between two topologically distinct insulators behaves like a conductor. 

    The proof relies on a semiclassical trace expansion, though the original problem is not semiclassical. It suggests that energy propagates along the interface in the form of waves  microlocalized at the singularities of an underlying (Bloch) bundle. This draws an apparently new connection between microlocal analysis and condensed matter physics.

     

    Updated on Oct 15, 2019 02:05 PM PDT
  4. 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
  5. MLA-Graduate Student Seminar

    Location: MSRI: Baker Board Room
    Created on Aug 26, 2019 02:41 PM PDT
  6. HDMP-Lunch Q&A session

    Location: MSRI: Commons Room
    Created on Oct 04, 2019 10:50 AM PDT
  7. MLA - Weekly Seminar (Part 1)

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

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

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

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  11. HDMP-Lunch Q&A session

    Location: MSRI: Commons Room
    Created on Oct 04, 2019 10:50 AM PDT
  12. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:31 PM PDT
  13. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:49 PM PDT
  14. MLA - Weekly Seminar (Part 1)

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

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

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

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  18. HDMP-Lunch Q&A session

    Location: MSRI: Commons Room
    Created on Oct 04, 2019 10:50 AM PDT
  19. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:31 PM PDT
  20. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:50 PM PDT
  21. MLA - Weekly Seminar (Part 1)

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

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

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

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  25. HDMP-Lunch Q&A session

    Location: MSRI: Commons Room
    Created on Oct 04, 2019 10:50 AM PDT
  26. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:32 PM PDT
  27. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:50 PM PDT
  28. MLA - Weekly Seminar (Part 1)

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

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

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

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  32. HDMP-Lunch Q&A session

    Location: MSRI: Commons Room
    Created on Oct 04, 2019 10:50 AM PDT
  33. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:32 PM PDT
  34. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:51 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-Graduate Student Seminar

    Location: MSRI: Simons Auditorium
    Created on Aug 26, 2019 02:41 PM PDT
  38. HDMP-Lunch Q&A session

    Location: MSRI: Commons Room
    Created on Oct 04, 2019 10:50 AM PDT
  39. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:33 PM PDT
  40. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:51 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: Baker Board Room
    Created on Aug 26, 2019 02:41 PM PDT
  45. HDMP-Lunch Q&A session

    Location: MSRI: Commons Room
    Created on Oct 04, 2019 10:50 AM PDT
  46. HDMP - Weekly Seminar (Part 1)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:34 PM PDT
  47. HDMP-Weekly Seminar (Part 2)

    Location: MSRI: Simons Auditorium
    Updated on Sep 26, 2019 01:52 PM PDT
  48. MLA - Weekly Seminar (Part 1)

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

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

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

Past Seminars

  1. Seminar HDMP-Lunch Q&A session

    Created on Oct 04, 2019 10:50 AM PDT
There are more then 30 past seminars. Please go to Past seminars to see all past seminars.