scholarly journals A weak type bound for a singular integral

2014 ◽  
Vol 30 (3) ◽  
pp. 961-978 ◽  
Author(s):  
Andreas Seeger
Keyword(s):  
Singular Integral ◽  
Weak Type

scholarly journals Commutators of the Hardy-Littlewood Maximal Operator with BMO Symbols on Spaces of Homogeneous Type

2008 ◽  
Vol 2008 ◽  
pp. 1-21 ◽  
Author(s):  
Guoen Hu ◽  
Haibo Lin ◽  
Dachun Yang
Keyword(s):  
Singular Integral ◽  
Maximal Operator ◽  
Weak Type ◽  
Integral Operators ◽  
Singular Integral Operators ◽  
Maximal Operators ◽  
Homogeneous Type ◽  
Spaces Of Homogeneous Type ◽  
Littlewood Maximal Operator

WeightedLpforp∈(1,∞)and weak-type endpoint estimates with general weights are established for commutators of the Hardy-Littlewood maximal operator with BMO symbols on spaces of homogeneous type. As an application, a weighted weak-type endpoint estimate is proved for maximal operators associated with commutators of singular integral operators with BMO symbols on spaces of homogeneous type. All results with no weight on spaces of homogeneous type are also new.

An Endpoint Estimate for Rough Maximal Singular Integrals

2018 ◽  
Vol 2020 (19) ◽  
pp. 6120-6134
Author(s):  
Petr Honzík
Keyword(s):  
Singular Integral ◽  
Singular Integrals ◽  
Weak Type ◽  
Maximal Singular Integrals ◽  
Maximal Singular Integral ◽  
Open Question

Abstract We study the rough maximal singular integral $$T^{\#}_\Omega\big(\,f\big)\big(x\big)=\sup_{\varepsilon>0} \left| \int_{\mathbb{R}^{n}\setminus B(0,\varepsilon)}|y|^{-n} \Omega(y/|y|)\,f(x-y) \mathrm{d}y\right|,$$where $\Omega$ is a function in $L^\infty (\mathbb{S}^{n-1})$ with vanishing integral. It is well known that the operator is bounded on $L^p$ for $1<p<\infty ,$ but it is an open question whether it is of the weak type 1-1. We show that $T^{\#}_\Omega$ is bounded from $L(\log \log L)^{2+\varepsilon }$ to $L^{1,\infty }$ locally.

On a Singular Integral of Christ–Journé Type with Homogeneous Kernel

2018 ◽  
Vol 61 (1) ◽  
pp. 97-113
Author(s):  
Yong Ding ◽  
Xudong Lai
Keyword(s):  
Singular Integral ◽  
Weak Type ◽  
Homogeneous Kernel

AbstractIn this paper, we prove that the singular integral defined byis bounded on Lp() for 1 < p < ∞ and is of weak type (1,1), where Ω ∈ L log+ L() and , with a ∈ L∞() satisfying some restricted conditions.

Boundedness of operators of Hardy type in ΛP,q spaces and weighted mixed inequalities for singular integral operators

1997 ◽  
Vol 127 (1) ◽  
pp. 157-170 ◽  
Author(s):  
F. J. Martín-Reyes ◽  
P. Ortega Salvador ◽  
M. D. Sarrión Gavilán
Keyword(s):  
Singular Integral ◽  
Singular Integrals ◽  
Weak Type ◽  
Integral Operators ◽  
Lorentz Spaces ◽  
Singular Integral Operators ◽  
Hardy Type

We consider certain n-dimensional operators of Hardy type and we study their boundedness in These spaces were introduced by M. J. Carro and J. Soria and include weighted Lp, q spaces and classical Lorentz spaces. As an application, we obtain mixed weak-type inequalities for Calderón—Zygmund singular integrals, improving results due to K. Andersen and B. Muckenhoupt.

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