##### Department of Mathematics,

University of California San Diego

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### Math 258: Differential Geometry

## Prof. Guozhen Lu

#### University of Connecticut

## Helgason-Fourier analysis on hyperbolic spaces and applications to sharp geometric inequalities

##### Abstract:

Sharp geometric and functional inequalities play an important role in analysis, PDEs and differential geometry. In this talk, we will describe our works in recent years on sharp higher order Poincare-Sobolev and Hardy-Sobolev-Maz'ya inequalities on real and complex hyperbolic spaces and noncompact symmetric spaces of rank one. The approach we have developed crucially relies on the Helgason-Fourier analysis on hyperbolic spaces and establishing such inequalities for the GJMS operators. Best constants for such inequalities will be compared with the classical higher order Sobolev inequalities in Euclidean spaces. The borderline case of such inequalities, such as the Moser-Trudinger and Adams inequalities will be also considered.

Host: Bennett Chow

### December 7, 2023

### 1:00 PM

APM 5829

Research Areas

Differential Equations Geometric Analysis****************************