Special Session 77: Recent developments in variational problems and geometric analysis

Quantitative stability of the Poincar\`{e}-Sobolev inequality on the hyperbolic space

Debabrata Karmakar
TIFR Centre for Applicable Mathematics
India
Co-Author(s):    Mousomi Bhakta, Debdip Ganguly, Debabrata Karmakar, and Saikat Mazumdar
Abstract:
The classical Sobolev inequality in $\mathbb{R}^n$ states that the $L^{\frac{2n}{n-2}}$-norm of smooth compactly supported functions can be controlled, up to an optimal constant $S,$ by the $L^2$-norm of their gradient. The explicit value of $S$ is known, and the cases where equality holds have been obtained and classified as {\it Aubin-Talenti bubbles.} The question of quantitative stability and its applications has garnered significant interest in recent times. In this presentation, we will explain the question of the stability of the optimizers and their counterparts within the framework of the hyperbolic space.