Special Session 31: Regularity of partial differential equations

Log BMO matrix weights and quasilinear elliptic equations with Orlicz growth

Rui Yang
Central South University
Peoples Rep of China
Co-Author(s):    Sun-Sig Byun
Abstract:
We study a very general quasilinear elliptic equation with the nonlinearity with Orlicz growth subject to a degenerate or singular matrix-valued weight on a bounded nonsmooth domain. The nonlinearity satisfies a nonstandard growth condition related to the associated Young function, and the logarithm of the matrix-valued weight in BMO is constrained by a smallness parameter which has a close relationship with the Young function. We establish a global Calder\`{o}n-Zygmund estimate for the weak solution of such a degenerate or singular problem in the setting of a weighted Orlicz space under a minimal geometric assumption that the boundary of the domain is sufficiently flat in the Reifenberg sense.