English

Pointwise descriptions of nearly incompressible vector fields with bounded curl

Classical Analysis and ODEs 2020-07-03 v1 Analysis of PDEs

Abstract

Among those nearly incompressible vector fields v:RnRn{\bf{v}}:{\mathbb{R}}^n\to{\mathbb{R}}^n with xlogx|x|\log|x| growth at infinity, we give a pointwise characterization of the ones for which curlv=DvDtv\operatorname{curl}{\bf{v}}= D{\bf{v}}-D^t{\bf{v}} belongs to LL^\infty. When n=2n=2 we can go further and describe, still in pointwise terms, the vector fields v:R2R2{\bf{v}}:{\mathbb{R}}^2\to{\mathbb{R}}^2 for which divv+curlvL|\operatorname{div}{\bf{v}}|+|\operatorname{curl}{\bf{v}}|\in L^\infty.

Keywords

Cite

@article{arxiv.2007.00918,
  title  = {Pointwise descriptions of nearly incompressible vector fields with bounded curl},
  author = {Albert Clop and Banhirup Sengupta},
  journal= {arXiv preprint arXiv:2007.00918},
  year   = {2020}
}