Current Seminars
Upcoming Seminars
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Learning seminar on stability conditions
Location: MSRI: Baker Board RoomCreated on Sep 04, 2019 09:31 AM PDT -
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 -
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 -
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 -
HDMP-Lunch Q&A session
Location: MSRI: Commons RoomCreated on Oct 04, 2019 10:50 AM PDT -
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 -
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 -
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 -
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 -
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 -
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 -
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
Past Seminars
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Seminar Spectral networks reading group
Created on Sep 05, 2019 03:05 PM PDT -
Seminar MLA - Regular Seminar (part 2): Low regularity solutions for water waves
Updated on Nov 27, 2019 02:08 PM PST -
Seminar HDMP - Physics: a guide for the perplexed: A QFT / Teichmuller theory dictionary
Updated on Dec 03, 2019 08:24 AM PST -
Seminar MLA - Regular Seminar (part 1): The Calderón projector for fibred cusp operators
Updated on Nov 27, 2019 02:07 PM PST -
Seminar Topics in Differential Geometry (Chancellor Course)
Updated on Sep 26, 2019 04:44 PM PDT -
Seminar MLA - Weekly Seminar (Part 2): Rigidity of Asymptotically Conic Spaces
Updated on Nov 27, 2019 02:06 PM PST -
Seminar MLA - 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 -
Seminar HDMP-Weekly Seminar (Part 2): TBA
Updated on Nov 25, 2019 11:52 AM PST -
Seminar HDMP - Weekly Seminar (Part 1): On the orbifold fundamental group of strata of abelian differentials
Updated on Nov 25, 2019 11:24 AM PST -
Seminar HDMP - Graduate Student Seminar: The Parreau-Compactification (Part 2)
Updated on Nov 27, 2019 09:09 AM PST -
Seminar HDMP-Lunch Q&A session
Created on Oct 04, 2019 10:50 AM PDT -
Seminar MLA - Special Seminar: Propagation of singularities for gravity-capillary waves
Updated on Nov 27, 2019 02:04 PM PST -
Seminar Topics in Differential Geometry (Chancellor Course)
Updated on Sep 26, 2019 04:44 PM PDT -
Seminar MLA-Graduate Student Seminar: The Travel Time Tomography Inverse Problem for Transversely Isotropic Elastic Media
Updated on Nov 27, 2019 09:24 AM PST -
Seminar Learning seminar on stability conditions: Spectral coordinates, pleated surfaces, and condensed matter physics
Updated on Dec 04, 2019 11:23 AM PST -
Seminar HDMP - Graduate Student Seminar: The Parreau-Compactification (Part 2)
Created on Nov 27, 2019 08:41 AM PST -
Seminar HDMP - Graduate Student Seminar: The Parreau-Compactification (Part 1)
Updated on Nov 21, 2019 08:44 AM PST -
Seminar Topics in Differential Geometry (Chancellor Course)
Created on Nov 22, 2019 01:42 PM PST -
Seminar MLA-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 -
Seminar MLA - Special Seminar: Dolgopyat's method and fractal uncertainty principle
Updated on Nov 21, 2019 01:07 PM PST -
Seminar MLA - Regular Seminar (part 2): Elliptic families and point-clusters
Updated on Nov 19, 2019 03:15 PM PST -
Seminar MLA - Regular Seminar (part 1): Wave decay for star-shaped waveguides
Updated on Nov 19, 2019 03:15 PM PST -
Seminar MLA - Special Seminar: Toeplitz operators, asymptotic Bergman projections, and second microlocalization
Updated on Nov 19, 2019 03:15 PM PST -
Seminar Iterated structures on manifolds working group: TBC
Created on Nov 14, 2019 11:19 AM PST -
Seminar HDMP - Physics: a guide for the perplexed: 2-d quantum gravity and Witten's conjecture
Updated on Nov 08, 2019 03:18 PM PST -
Seminar HDMP-Lunch Q&A session
Updated on Nov 11, 2019 01:54 PM PST -
Seminar Spectral networks reading group: TBA
Updated on Nov 08, 2019 08:28 AM PST -
Seminar MLA - Regular Seminar (part 2): Spectral gaps and uncertainty principles
Updated on Nov 07, 2019 04:49 PM PST -
Seminar MLA - Weekly Seminar (Part 2): Local rigidity of manifolds with hyperbolic cusps
Updated on Nov 11, 2019 09:11 AM PST -
Seminar HDMP-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