BMO-Interpolations and Jump Detection for Functions in $BV\cap BMO$

Abstract

In this article, we prove interpolation results for $BMO$ in Lorentz spaces. From these results, we derive interpolation theorems in Besov spaces, the space $BV$, and fractional Sobolev spaces. As an application, we obtain geometric information about the jump set of functions in $BV \cap BMO$.