# Mathematical Sciences Research Institute

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# Current Seminars

No current seminar

1. # Learning seminar on stability conditions

Location: MSRI: Baker Board Room
Created on Sep 04, 2019 09:31 AM PDT
2. # MLA - Regular Seminar (part 1): Propagation of singularities for the Dirac equation with Coulomb-like potentials

Location: MSRI: Baker Board Room
Speakers: Dean Baskin (Texas A & M University)

The Dirac equation describes the relativistic evolution of electrons and positrons.  We consider the (time-dependent!) Dirac equation in three dimensions coupled to a potential with Coulomb-type singularities.  We prove a propagation of singularities result for this equation and show that singularities are diffracted by the singularities of the potential.  We finally compute the symbol of the diffracted wave and show it is typically non-zero.  This talk is based on joint work with Jared Wunsch.

Updated on Dec 04, 2019 04:24 PM PST
3. # MLA-Graduate Student Seminar: Weyl Symbols and Boundedness of Toeplitz Operators

Location: MSRI: Baker Board Room
Speakers: Francis White (University of California, Los Angeles)

We study Toeplitz operators on the Bargmann space, with Toeplitz symbols that are exponentials of inhomogeneous quadratic polynomials. It is shown that the boundedness of such operators is implied by the boundedness of the corresponding Weyl symbols. This is joint work with L. Coburn, M. Hitrik, and J. Sjöstrand.

Updated on Nov 27, 2019 09:25 AM PST
4. # Topics in Differential Geometry (Chancellor Course)

Location: UC Berkeley (Evans Hall 740)
Speakers: François Labourie (Université Côte d'Azur)
Created on Nov 15, 2019 10:40 AM PST
5. # HDMP-Lunch Q&A session

Location: MSRI: Commons Room
Created on Oct 04, 2019 10:50 AM PDT
6. # MLA - Regular Seminar (part 2): Trapping in Perturbations of Kerr Spacetimes

Location: MSRI: Simons Auditorium
Speakers: Peter Hintz (Massachusetts Institute of Technology)

We study the trapped set of spacetimes whose metric decays to a stationary Kerr metric at an inverse polynomial rate. In the first part of the talk, I will focus on the dynamical aspects of this problem and show that the trapped set is a smooth submanifold which converges to that of the stationary metric at the same rate. In the second part, I will explain how to use this to prove microlocal estimates at the trapped set for solutions of wave equations on such spacetimes.

Updated on Dec 04, 2019 04:25 PM PST
7. # HDMP - Graduate Student Seminar: The Parreau compactification (part 3)

Location: MSRI: Baker Board Room
Speakers: Ivo Slegers (Max-Planck-Institut für Mathematik)
Updated on Dec 06, 2019 11:06 AM PST
8. # HDMP - Weekly Seminar (Part 1): An invitation to veering triangulations

Location: MSRI: Simons Auditorium
Speakers: Ian Agol (University of California, Berkeley)

The study of pseudo-Anosov homeomorphisms of surfaces can be understood via train tracks carrying the stable and unstable laminations. After Hamenstadt, one has a splitting complex, which gives rise to a dual triangulation of the punctured mapping torus known as a veering triangulation. I'll discuss the combinatorial properties of these triangulations, and survey some of the literature on the topic. Applications include the conjugacy problem, describing short geodesics in moduli spaces, and relations with hyperbolic geometry.

Updated on Dec 04, 2019 08:51 AM PST
9. # HDMP-Weekly Seminar (Part 2): Fibered 3-manifolds and Weil-Petersson geometry of Teichmuller space

Location: MSRI: Simons Auditorium
Speakers: Yair Minsky (Yale University)

When a 3-manifold fibers over the circle it often does so in infinitely many ways, and this gives a kind of laboratory for studying Teichmuller spaces and mapping class groups in many surfaces at once. Farb-Leininger-Margalit proved an influential theorem showing that fibered 3-manifolds organize the mapping classes of "short" Teichmuller translation length in all genera. We prove an analogous theorem for Weil-Petersson translation length. The proof uses recent theorems on renormalized volume as well as good old fashioned 3-manifold topology from the 1980s.  Quadratic differentials come into the story in a couple of different ways that I will try to point out. Joint work with Leininger, Souto and Taylor.

Updated on Dec 05, 2019 08:36 AM PST
10. # MLA - Weekly Seminar (Part 1): Outgoing Fredholm theory and the limiting absorption principle for asymptotically conic spaces

Location: MSRI: Simons Auditorium
Speakers: Andras Vasy (Stanford University)

In this talk I will discuss geometric generalizations of Euclidean resolvent estimates, such as estimates for the resolvent of the Laplacian of an asymptotically conic metric plus a decaying potential, in a Fredholm framework that focuses on capturing the outgoing asymptotics of the resolvent applied to a Schwartz function (outgoing waves); this is different from even the usual treatment of the Euclidean problem. More precisely, the setting is that of perturbations $P(\sigma)$ of the spectral family of the Laplacian $\Delta_g-\sigma^2$ on asymptotically conic spaces $(X,g)$ of dimension at least $3$ (with the asymptotic behavior at the `large end’ of the cone), and the main results are the limiting absorption principle, as well as uniform estimates for $P(\sigma)^{-1}$ as $\sigma\to 0$, on function spaces between which $P(\sigma)$ is Fredholm even for real $\sigma\neq 0$ and which correspond to finite regularity Lagrangian distributions (second microlocal spaces) associated to the, conic in the base, Lagrangian given by the outgoing radial set of the Hamilton flow. Such results have immediate applications to the behavior of the wave equation on black hole spacetimes.

Updated on Dec 04, 2019 04:26 PM PST
11. # MLA - Weekly Seminar (Part 2): Some Open Inverse Problems

Location: MSRI: Simons Auditorium
Speakers: Gunther Uhlmann (University of Washington)
Updated on Dec 04, 2019 04:27 PM PST
12. # HDMP - Physics: a guide for the perplexed: A QFT / Teichmuller theory dictionary

Location: MSRI: Baker Board Room
Speakers: Andrew Neitzke (University of Texas, Austin)
Updated on Dec 06, 2019 11:20 AM PST

1. # SeminarSpectral networks reading group

Created on Sep 05, 2019 03:05 PM PDT
2. # SeminarMLA - Regular Seminar (part 2): Low regularity solutions for water waves

Updated on Nov 27, 2019 02:08 PM PST
3. # SeminarHDMP - Physics: a guide for the perplexed: A QFT / Teichmuller theory dictionary

Updated on Dec 03, 2019 08:24 AM PST
4. # SeminarMLA - Regular Seminar (part 1): The Calderón projector for fibred cusp operators

Updated on Nov 27, 2019 02:07 PM PST
5. # SeminarTopics in Differential Geometry (Chancellor Course)

Updated on Sep 26, 2019 04:44 PM PDT
6. # SeminarMLA - Weekly Seminar (Part 2): Rigidity of Asymptotically Conic Spaces

Updated on Nov 27, 2019 02:06 PM PST
7. # SeminarMLA - Weekly Seminar (Part 1): X-ray transforms on simple Riemannian manifolds with boundary: mapping properties and consequences

Updated on Nov 27, 2019 02:05 PM PST
8. # SeminarHDMP-Weekly Seminar (Part 2): TBA

Updated on Nov 25, 2019 11:52 AM PST
9. # SeminarHDMP - Weekly Seminar (Part 1): On the orbifold fundamental group of strata of abelian differentials

Updated on Nov 25, 2019 11:24 AM PST
10. # SeminarHDMP - Graduate Student Seminar: The Parreau-Compactification (Part 2)

Updated on Nov 27, 2019 09:09 AM PST
11. # SeminarHDMP-Lunch Q&A session

Created on Oct 04, 2019 10:50 AM PDT
12. # SeminarMLA - Special Seminar: Propagation of singularities for gravity-capillary waves

Updated on Nov 27, 2019 02:04 PM PST
13. # SeminarTopics in Differential Geometry (Chancellor Course)

Updated on Sep 26, 2019 04:44 PM PDT
14. # SeminarMLA-Graduate Student Seminar: The Travel Time Tomography Inverse Problem for Transversely Isotropic Elastic Media

Updated on Nov 27, 2019 09:24 AM PST
15. # SeminarLearning seminar on stability conditions: Spectral coordinates, pleated surfaces, and condensed matter physics

Updated on Dec 04, 2019 11:23 AM PST
16. # SeminarHDMP - Graduate Student Seminar: The Parreau-Compactification (Part 2)

Created on Nov 27, 2019 08:41 AM PST
17. # SeminarHDMP - Graduate Student Seminar: The Parreau-Compactification (Part 1)

Updated on Nov 21, 2019 08:44 AM PST
18. # SeminarTopics in Differential Geometry (Chancellor Course)

Created on Nov 22, 2019 01:42 PM PST
19. # SeminarMLA-Graduate Student Seminar: Noncommutative techniques for inverting the sub-Riemannian X-ray Transform on the Heisenberg Group

Updated on Nov 21, 2019 10:03 AM PST
20. # SeminarMLA - Special Seminar: Dolgopyat's method and fractal uncertainty principle

Updated on Nov 21, 2019 01:07 PM PST
21. # SeminarMLA - Regular Seminar (part 2): Elliptic families and point-clusters

Updated on Nov 19, 2019 03:15 PM PST
22. # SeminarMLA - Regular Seminar (part 1): Wave decay for star-shaped waveguides

Updated on Nov 19, 2019 03:15 PM PST
23. # SeminarMLA - Special Seminar: Toeplitz operators, asymptotic Bergman projections, and second microlocalization

Updated on Nov 19, 2019 03:15 PM PST
24. # SeminarIterated structures on manifolds working group: TBC

Created on Nov 14, 2019 11:19 AM PST
25. # SeminarHDMP - Physics: a guide for the perplexed: 2-d quantum gravity and Witten's conjecture

Updated on Nov 08, 2019 03:18 PM PST
26. # SeminarHDMP-Lunch Q&A session

Updated on Nov 11, 2019 01:54 PM PST
27. # SeminarSpectral networks reading group: TBA

Updated on Nov 08, 2019 08:28 AM PST
28. # SeminarMLA - Regular Seminar (part 2): Spectral gaps and uncertainty principles

Updated on Nov 07, 2019 04:49 PM PST
29. # SeminarMLA - Weekly Seminar (Part 2): Local rigidity of manifolds with hyperbolic cusps

Updated on Nov 11, 2019 09:11 AM PST
30. # SeminarHDMP-Weekly Seminar (Part 2): Symplectic properties of monodromy map for second order equation on a Riemann surface

Updated on Nov 11, 2019 09:10 AM PST
There are more then 30 past seminars. Please go to Past seminars to see all past seminars.