Results 11 to 20 of about 1,699,857 (244)

Weighted composition operators between two different weighted sequence spaces

open access: yesAdvances in Pure and Applied Mathematics, 2022
We give simple criteria which characterize the symbols u, ϕ defining continuous and compact weighted composition operators Wu,ϕ acting between two different weighted sequence spaces.
Carlos Carpintero   +2 more
doaj   +2 more sources

Multipliers of Banach valued weighted function spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2000
We generalize Banach valued spaces to Banach valued weighted function spaces and study the multipliers space of these spaces. We also show the relationship between multipliers and tensor product of Banach valued weighted function spaces.
Serap Öztop
doaj   +2 more sources

Norms of certain operators on weighted L-spaces and Lorentz sequence spaces. [PDF]

open access: yes, 2002
The problem addressed is the exact determination of the norms of the classical Hilbert, Copson and averaging operators on weighted spaces and the corresponding Lorentz sequence spaces , with the power weighting sequence or the variant defined by .
Jameson, Graham J. O., Lashkaripour, R.
core   +4 more sources

Weighted Sobolev spaces on curves [PDF]

open access: yes, 2002
45 pages, no figures.-- MSC1987 codes: 41A10, 46E35, 46G10.MR#: MR1934626 (2003j:46038)Zbl#: Zbl 1019.46026In this paper we present a definition of weighted Sobolev spaces on curves and find general conditions under which the spaces are complete for non ...
Pestana, Domingo   +3 more
core   +1 more source

Component-by-component construction of good intermediate-rank lattice rules [PDF]

open access: yes, 2003
It is known that the generating vector of a rank-1 lattice rule can be constructed component-by-component to achieve strong tractability error bounds in both weighted Korobov spaces and weighted Sobolev spaces.
Joe, Stephen, Kuo, Frances Y.
core   +1 more source

Approximation theory for weighted Sobolev spaces on curves [PDF]

open access: yes, 2001
17 pages, no figures.-- MSC2000 codes: 41A10, 46E35, 46G10.MR#: MR1882649 (2003c:42002)In this paper we present a definition of weighted Sobolev spaces on curves and find general conditions under which the spaces are complete.
Pestana Galván, Domingo   +6 more
core   +1 more source

Approximation and entropy numbers of embeddings in weighted Orlicz spaces [PDF]

open access: yes, 1991
summary:Upper estimates are obtained for approximation and entropy numbers of the embeddings of weighted Sobolev spaces into appropriate weighted Orlicz spaces.
Sun, Jiong, Edmunds, D. E.
core   +1 more source

On weighted spaces without a fundamental sequence of bounded sets

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
The problem of countably quasi-barrelledness of weighted spaces of continuous functions, of which there are no results in the general setting of weighted spaces, is tackled in this paper.
J. O. Olaleru
doaj   +1 more source

Weighted Composition Operators from Weighted Bergman Spaces to Weighted-Type Spaces on the Upper Half-Plane

open access: yesAbstract and Applied Analysis, 2011
Let ψ be a holomorphic mapping on the upper half-plane Π+={z∈ℂ:Jz>0} and φ be a holomorphic self-map of Π+. We characterize bounded weighted composition operators acting from the weighted Bergman space to the weighted-type space on the upper half-plane ...
Stevo Stević   +2 more
doaj   +1 more source

Density of Weighted L~p Spaces

open access: yesNantong Daxue xuebao. Ziran kexue ban, 2021
Because the elements of Hardy spaces are only distributions, generally, the atomic decomposition is first established in its dense subset. In this process, S_0(R~n), defined by ■, is very important.
DING Wei
doaj   +1 more source

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