Beltrami equations in the plane and Sobolev regularity

Abstract

New results regarding the Sobolev regularity of the principal solution of the linear Beltrami equation $\bar{\partial }f=\mu \partial f+\nu \overline{\partial f}$ for discontinuous Beltrami coefficients $\mu$ and $\nu$ are obtained, using Kato-Ponce commutators, obtaining that $\overline{\partial }f$ belongs to a Sobolev space with the same smoothness as the coefficients but some loss in the integrability parameter. A conjecture on the cases where the limitations of the method do not work is raised.

arXiv comment13 pages, 12 figures