English

$A_\infty$ condition for general bases revisited: complete classification of definitions

Classical Analysis and ODEs 2021-06-01 v1

Abstract

We refer to the discussion on different characterizations of the AA_\infty class of weights, initiated by Duoandikoetxea, Mart\'in-Reyes, and Ombrosi. Twelve definitions of the AA_\infty condition are considered. For cubes in Rd\mathbb{R}^d every two conditions are known to be equivalent, while for general bases we have a trichotomy: equivalence, one-way implication, or no dependency may occur. In most cases the relations between different conditions have already been established. Here all the unsolved cases are treated and, as a result, a full diagram of the said relations is presented.

Cite

@article{arxiv.2105.14852,
  title  = {$A_\infty$ condition for general bases revisited: complete classification of definitions},
  author = {Dariusz Kosz},
  journal= {arXiv preprint arXiv:2105.14852},
  year   = {2021}
}

Comments

10 pages, 1 table, 1 figure

R2 v1 2026-06-24T02:39:14.436Z