Fourier analysis provides a powerful framework for decomposing functions into sums or integrals of sinusoidal components, thereby enabling the study of frequency content in signals. In tandem, ...
Under the assumption that μ is a non-doubling measure on ℝd, the authors obtain the boundedness of commutators generated by Calderón-Zygmund operators or fractional integrals with Lipschitz functions ...
Every composition operator Cφ on the Lipschitz space Lip0(X) attains its norm. This fact is essentially known and we give in this paper a sequential characterization of the extremal functions for the ...
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