Iterated commutators under a joint condition on the tuple of multiplying functions
Abstract
We present a pair of joint conditions on the two functions b1,b2 strictly weaker than b1,b2∈ BMO that almost characterize the L2 boundedness of the iterated commutator [b2,[b1,T]] of these functions and a Calder\'on-Zygmund operator T. Namely, we sandwich this boundedness between two bisublinear mean oscillation conditions of which one is a slightly bumped up version of the other.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.