Sharp Lorentz-norm estimates for BMO martingales

2021 ◽  
pp. 109068
Author(s):  
Łukasz Kamiński ◽  
Adam Osękowski
Keyword(s):  
Norm Estimates ◽  
Bmo Martingales ◽  
Lorentz Norm

Sharp Lorentz-norm estimates for dyadic-like maximal operators

2021 ◽  
Vol 257 (1) ◽  
pp. 87-110
Author(s):  
Adam Osękowski ◽  
Mateusz Rapicki
Keyword(s):  
Maximal Operators ◽  
Norm Estimates ◽  
Lorentz Norm

Essential norms of weighted differentiation composition operators between Zygmund type spaces and Bloch type spaces

Filomat ◽  
2017 ◽  
Vol 31 (9) ◽  
pp. 2877-2889 ◽  
Author(s):  
Amir Sanatpour ◽  
Mostafa Hassanlou
Keyword(s):  
Composition Operators ◽  
Sufficient Conditions ◽  
Essential Norm ◽  
Necessary And Sufficient Conditions ◽  
Norm Estimates ◽  
Type Spaces ◽  
Necessary And Sufficient

We study boundedness of weighted differentiation composition operators Dk?,u between Zygmund type spaces Z? and Bloch type spaces ?. We also give essential norm estimates of such operators in different cases of k ? N and 0 < ?,? < ?. Applying our essential norm estimates, we get necessary and sufficient conditions for the compactness of these operators.

scholarly journals Norm estimates for Chebyshev polynomials, I

2021 ◽  
pp. 105561
Author(s):  
Klaus Schiefermayr ◽  
Maxim Zinchenko
Keyword(s):  
Chebyshev Polynomials ◽  
Norm Estimates

Euclidean norm estimates of the inverse of some special block matrices

2016 ◽  
Vol 284 ◽  
pp. 12-23 ◽  
Author(s):  
Ljiljana Cvetković ◽  
Vladimir Kostić ◽  
Ksenija Doroslovački ◽  
Dragana Lj. Cvetković
Keyword(s):  
Euclidean Norm ◽  
Block Matrices ◽  
Norm Estimates
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