English

Pointwise rotation for homeomorphisms with integrable distortion and controlled compression

Dynamical Systems 2025-12-23 v2 Analysis of PDEs Complex Variables

Abstract

We obtain sharp rotation bounds for homeomorphisms f:CCf:\mathbb{C}\to\mathbb{C} whose distortion is in LlocpL^p_{loc}, p1p\geq1, and whose inverse have controlled modulus of continuity. The motivation to study this class of maps comes from so-called Yudovich solutions to planar Euler equations. Furthermore, we present examples proving sharpness in a strong sense, thereby settling the borderline case p=1p=1 in \cite[Theorem 3]{CHS}.

Keywords

Cite

@article{arxiv.2110.12809,
  title  = {Pointwise rotation for homeomorphisms with integrable distortion and controlled compression},
  author = {Lauri Hitruhin and Banhirup Sengupta},
  journal= {arXiv preprint arXiv:2110.12809},
  year   = {2025}
}

Comments

The new version has been shortened to 15 pages

R2 v1 2026-06-24T07:09:24.602Z