Some jump and variational inequalities for the Calderón commutators and related operators

Yanping Chen, Yong Ding, Guixiang Hong, Jie Xiao

Published 2017-09-10Version 1

In this paper, we establish jump and variational inequalities for the Calder\'{o}n commutators, which are typical examples of non-convolution Calder\'on-Zygmund operators. For this purpose, we also show jump and variational inequalities for para-products and commutators from pseudo-differential calculus, which are of independent interest. New ingredients in the proofs involve identifying Carleson measures constructed from sequences of stopping times, in addition to many Littlewood-Paley type estimates with gradient.