Weighted mixed endpoint estimates of Fefferman-Stein type for commutators of singular integral operators (Q6616021)

In the manuscript under examination, the authors study weighted mixed endpoint estimates of Fefferman-Stein type for commutators of singular integral operators. The results obtained in this work are essentially correct. The mixed weak estimates of Fefferman-Stein type for higher order commutators of Calderón-Zygmund operators with BMO symbol are very important results in the literature. Also, the authors obtain estimates for commutators of operators with a kernel with less regularity, satisfying a condition of \(L^{\Phi}\)-Hörmander type.