scholarly journals Dunkl Translation and Uncentered Maximal Operator on the Real Line

Author(s):  
Chokri Abdelkefi ◽  
Mohamed Sifi

We establish estimates of the Dunkl translation of the characteristic functionχ[−ɛ,ɛ],ɛ>0, and we prove that the uncentered maximal operator associated with the Dunkl operator is of weak type(1,1). As a consequence, we obtain theLp-boundedness of this operator for1<p≤+∞.

Author(s):  
A. L. Bernardis ◽  
F. J. Martín-Reyes

We consider the maximal operator defined on the real line by which is related to the Cesàro convergence of the singular integrals. We characterize the weights w for which Mα is of weak type, strong type and restricted weak type (p, p) with respect to the measure w(x) dx.


2021 ◽  
Vol 164 (1) ◽  
pp. 133-148
Author(s):  
Łukasz Kamiński ◽  
Adam Osękowski

Author(s):  
J. M. Aldaz

We answer questions of A. Carbery, M. Trinidad Menárguez and F. Soria by proving, firstly, that for the centred Hardy–Littlewood maximal function on the real line, the best constant C for the weak type (1, 1) inequality is strictly larger than 3/2, and secondly, that C is strictly less than 2 (known to be the best constant in the noncentred case).


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