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Transference and restriction of maximal multiplier operators on Hardy spaces

Zhixin LiuShanzhen Lu — 1993

Studia Mathematica

The aim of this paper is to establish transference and restriction theorems for maximal operators defined by multipliers on the Hardy spaces H p ( n ) and H p ( n ) , 0 < p ≤ 1, which generalize the results of Kenig-Tomas for the case p > 1. We prove that under a mild regulation condition, an L ( n ) function m is a maximal multiplier on H p ( n ) if and only if it is a maximal multiplier on H p ( n ) . As an application, the restriction of maximal multipliers to lower dimensional Hardy spaces is considered.

Regularity of some nonlinear quantities on superharmonic functions in local Herz-type Hardy spaces.

Dashan FanShanzhen LuDachun Yang — 1998

Publicacions Matemàtiques

In this paper, the authors introduce a kind of local Hardy spaces in R associated with the local Herz spaces. Then the authors investigate the regularity in these local Hardy spaces of some nonlinear quantities on superharmonic functions on R. The main results of the authors extend the corresponding results of Evans and Müller in a recent paper.

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