Rearrangements in Carnot Groups
Analysis of PDEs
2019-01-24 v2
Abstract
In this paper we extend the notion of rearrangement of nonnegative functions to the setting of Carnot groups. We define rearrangement with respect to a given family of anisotropic balls B_r or equivalently with respect to a gauge |x|, and prove basic regularity properties of this construction. If u is a bounded nonnegative real function with compact support, we denote by u* its rearrangement. Then, the radial function u*. is of bounded variation. In addition, if u is continuous then u* is continuous, and if U belongs to the horizontal Sobolev space, we found a generalization of the inequality of Polya and Szeg\"o.
Cite
@article{arxiv.1805.10595,
title = {Rearrangements in Carnot Groups},
author = {Juan J. Manfredi and Virginia N. Vera De Serio},
journal= {arXiv preprint arXiv:1805.10595},
year = {2019}
}