The HADES seminar on Tuesday, December 10th, will be at 2:00pm in Room 740.
Speaker: Shrey Aryan
Abstract: In this talk, we will discuss the proof of the Soliton Resolution Conjecture for the radial critical non-linear heat equation in dimension
The HADES seminar on Tuesday, December 10th, will be at 2:00pm in Room 740.
Speaker: Shrey Aryan
Abstract: In this talk, we will discuss the proof of the Soliton Resolution Conjecture for the radial critical non-linear heat equation in dimension
The HADES seminar on Tuesday, December 3rd, will be at 2:00pm in Room 740.
Speaker: Elena Kim
Abstract: We consider a quantum cat map
For the analogous model on hyperbolic manifolds, the quantum unique ergodicity conjecture posits that the Liouville measure is the only semiclassical measure; however, the corresponding statement for quantum cat maps is known to be false. It is thus an open question to otherwise describe semiclassical measures for quantum cat maps.
In this talk, I will explain how the higher-dimensional fractal uncertainty principle of Cohen can be used to characterize the supports of semiclassical measures
The HADES seminar on Tuesday, November 26th, will be at 2:00pm in Room 740.
Speaker: Ciprian Demeter (Indiana University Bloomington)
Abstract: Partition the unit square into
The HADES seminar on Tuesday, November 19th, will be at 2:00pm in Room 740.
Speaker: Arian Nadjimzadah (UCLA)
Abstract: In this talk, we describe the deep connection between oscillatory integrals and curved Kakeya problems that was observed by Bourgain. Then we sketch some of the key discoveries in the study of the classical Kakeya problem in
The HADES seminar on Tuesday, November 12th, will be at 2:00pm in Room 740.
Speaker: Jose Lopez
Abstract: The Yang-Mills equations are important in physics because the equations of motion of the fundamental forces of particle physics are described by quantized versions of these equations. As an example, we will study the work of Mazzeo-Swoboda-Weiss-Witt on the asymptotics of Hitchin’s equations, a dimensional reduction of Yang-Mills.
The HADES seminar on Tuesday, November 5th, will be at 2:00pm in Room 740.
Speaker: Ning Tang
Abstract: The hyperbolic vanishing mean curvature (HVMC) equation in Minkowski space is a quasilinear wave equation that serves as the hyperbolic counterpart of the minimal surface equation in Euclidean space. This talk will concern the modulated nonlinear asymptotic stability of the
In this talk, I will first give an outline of the proof and then focus on a model case to illustrate our approach to achieving an improved decay in
The HADES seminar on Tuesday, October 29th, will be at 2:00pm in Room 740.
Speaker: James Rowan
Abstract: Computers cannot do exact arithmetic with arbitrary real numbers. But as analysts, that shouldn’t bother us too much since we usually deal in inequalities; often, we only need upper and lower bounds. I will give an introduction to interval arithmetic and survey some ways to make rigorous use of numerics in PDE proofs. First, I will discuss an interval arithmetic version of Newton’s method for root-finding and illustrate its use to compute a threshold value of a physical parameter in a solitary water waves problem (from joint work with Lizhe Wan). Then I will discuss the use of interval arithmetic to “upgrade” approximate solutions to nearby exact solutions and give a survey of some recent developments in this area that have inspired some recent projects I have been working on.
The HADES seminar on Tuesday, October 22th, will be at 2:00pm in Room 740.
Speaker: Zhenhao Li
Abstract: The internal waves equation describes perturbations of a stable-stratified fluid. In an effectively 2D aquarium
with Dirichlet boundary conditions. The behavior of the equation is intimately related to the underlying classical dynamics, and Dyatlov-Wang-Zworski proved that for
The HADES seminar on Tuesday, October 15th, will be at 2:00pm in Room 740.
Speaker: Andrea Nuetzi
Abstract: We construct a chain homotopy for the de Rham complex of relative differential forms on compact manifolds with boundary. This chain homotopy has desirable support propagation properties, and satisfies estimates relative to weighted Sobolev norms, where the weights measure decay near the boundary. The estimates are optimal given the homogeneity properties of the de Rham differential under boundary dilation. When applied to the radial compactification of Euclidean space, this construction yields, in particular, a right inverse of the divergence operator that preserves support on large balls around the origin, and satisfies estimates that measure decay near infinity. I will explain how this right inverse can then be used to also obtain a right inverse of the divergence operator on symmetric traceless matrices in three dimensions.
The HADES seminar on Tuesday, October 8th, will be at 2:00pm in Room 740.
Speaker: Robert Schippa
Abstract: We consider -smoothing estimates for the wave equation with harmonic potential. For the proof, we linearize an FIO parametrix, which yields Klein-Gordon propagation with variable mass parameter. We obtain decoupling and square function estimates depending on the mass parameter, which yields local smoothing estimates with sharp loss of derivatives. The obtained range is sharp in 1D, and partial results are obtained in higher dimensions.