6533b82bfe1ef96bd128cfd5
RESEARCH PRODUCT
Uniform rectifiability and ε-approximability of harmonic functions in Lp
Steve HofmannOlli Tapiolasubject
ε-approximabilitypotentiaaliteoriaharmonic functions.mittateoriaCarleson measuresharmoninen analyysiuniform rectifiabilitydescription
Suppose that E⊂Rn+1 is a uniformly rectifiable set of codimension 1. We show that every harmonic function is ε-approximable in Lp(Ω) for every p∈(1,∞), where Ω:=Rn+1∖E. Together with results of many authors this shows that pointwise, L∞ and Lp type ε-approximability properties of harmonic functions are all equivalent and they characterize uniform rectifiability for codimension 1 Ahlfors–David regular sets. Our results and techniques are generalizations of recent works of T. Hytönen and A. Rosén and the first author, J. M. Martell and S. Mayboroda. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-01 |