English

The matrix $A_2$ conjecture fails, i.e. $3/2>1$

Classical Analysis and ODEs 2024-02-13 v1

Abstract

We show that the famous matrix A2A_2 conjecture is false: the norm of the Hilbert Transform in the space L2(W)L^2(W) with matrix weight WW is estimated below by C[W]A23/2C[W]_{{A}_2}^{3/2}.

Cite

@article{arxiv.2402.06961,
  title  = {The matrix $A_2$ conjecture fails, i.e. $3/2>1$},
  author = {Komla Domelevo and Stefanie Petermichl and Sergei Treil and Alexander Volberg},
  journal= {arXiv preprint arXiv:2402.06961},
  year   = {2024}
}

Comments

46 pages, 5 figures

R2 v1 2026-06-28T14:44:56.069Z