Results 21 to 30 of about 637,479 (268)

Generalized Fourier multipliers

open access: yesAnnals of Functional Analysis, 2023
In this paper, the authors introduce and study a class of linear operators defined on a separable Hilbert space \(\mathcal{H}\). Generalized Fourier multipliers are defined using abstract Fourier theory on separable Hilbert spaces. The main goal of this paper is to give and prove some results regarding the boundedness, compactness, and Schatten-von ...
Viorel Catană   +2 more
openaire   +1 more source

A multiplier theorem for Fourier transforms [PDF]

open access: yesTransactions of the American Mathematical Society, 1974
A function f analytic in the upper half-plane Π
openaire   +2 more sources

Multipliers for semigroups. [PDF]

open access: yes, 1996
Let L be a positive invertible self-adjoint operator in L2(X;C). Using transference methods for locally bounded groups of operators we obtain multipliers for the group of complex powers Liu on vector-valued Lebesgue spaces.
Blower, Gordon
core   +4 more sources

A brief description of operators associated to the quantum harmonic oscillator on Schatten-von Neumann classes

open access: yesRevista Integración, 2018
In this note we study pseudo-multipliers associated to the harmonic oscillator (also called Hermite multipliers) belonging to Schatten classes on L2(Rn). We also investigate the spectral trace of these operators.
Duván Cardona
doaj   +1 more source

Numerical Analysis of Fourier Finite Volume Element Method for Dirichlet Boundary Optimal Control Problems Governed by Elliptic PDEs on Complex Connected Domains

open access: yesMathematics, 2022
In this research, we investigate an optimal control problem governed by elliptic PDEs with Dirichlet boundary conditions on complex connected domains, which can be utilized to model the cooling process of concrete dam pouring.
Mengya Su, Liuqing Xie, Zhiyue Zhang
doaj   +1 more source

Spherical-Radial Multipliers on the Heisenberg Group

open access: yesInternational Journal of Analysis and Applications, 2020
Let Hn be the (2n+1)-dimensional Heisenberg group. We consider a radial Fourier multiplier which is a spherical function on Hn and show that it is a Herz-Schur multiplier.
M.E. Egwe
doaj  

A convolution type characterization for Lp - multipliers for the Heisenberg group

open access: yesJournal of Function Spaces and Applications, 2007
It is well known that if m is an Lp - multiplier for the Fourier transform on ℝn ...
R. Radha, A.K. Vijayarajan
doaj   +1 more source

Estimates for the commutator of bilinear Fourier multiplier [PDF]

open access: yes, 2013
summary:Let $b_1, b_2 \in {\rm BMO}(\mathbb {R}^n)$ and $T_{\sigma }$ be a bilinear Fourier multiplier operator with associated multiplier $\sigma $ satisfying the Sobolev regularity that $\sup _{\kappa \in \mathbb {Z}} \|\sigma _{\kappa }\| _{W^{s_1,s_2}
Duong, Xuan Thinh   +3 more
core   +1 more source

Bilinear Oscillatory Fourier Multipliers

open access: yesJournal of Fourier Analysis and Applications
27 pages, 1 ...
Kato, Tomoya   +3 more
openaire   +2 more sources

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