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Fourier restriction to polynomial curves I: a geometric inequality [PDF]

open access: yes, 2010
We prove a Fourier restriction result for general polynomial curves in Rd. Measuring the Fourier restriction with respect to the affine arclength measure of the curve, we obtain a universal estimate for the class of all polynomial curves of bounded ...
Wright, James   +5 more
core   +1 more source

Fourier transforms of Lipschitz functions on the hyperbolic plane H2

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1998
The purpose of the present work is to study the order of magnitude of the Fourier transforms fˆ(λ) for large λ of complex-valued functions f(z) sating certain Lipschitz conditions in the non-Euclidean hyperbolic plane H2.
M. S. Younis
doaj   +1 more source

Computation of Fourier transform representations involving the generalized Bessel matrix polynomials

open access: yesAdvances in Difference Equations, 2021
Motivated by the recent studies and developments of the integral transforms with various special matrix functions, including the matrix orthogonal polynomials as kernels, in this article we derive the formulas for Fourier cosine and sine transforms of ...
M. Abdalla, M. Akel
doaj   +1 more source

On the Fractional Derivative Duality in Some Transforms

open access: yesMathematics, 2023
Duality is one of the most interesting properties of the Laplace and Fourier transforms associated with the integer-order derivative. Here, we will generalize it for fractional derivatives and extend the results to the Mellin, Z and discrete-time Fourier
Manuel Duarte Ortigueira   +1 more
doaj   +1 more source

Fourier transforms in generalized Fock spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1990
A classical Fock space consists of functions of the form,Φ↔(ϕ0,ϕ1,…,ϕq,…),where ϕ0∈C and ϕq∈L2(R3q), q≥1. We will replace the ϕq, q≥1 with q-symmetric rapid descent test functions within tempered distribution theory.
John Schmeelk
doaj   +1 more source

P3DFFT: A Framework for Parallel Computations of Fourier Transforms in Three Dimensions [PDF]

open access: yesSIAM Journal on Scientific Computing, 2012
Fourier and related transforms are a family of algorithms widely employed in diverse areas of computational science, notoriously difficult to scale on high-performance parallel computers with a large number of processing elements (cores).
D. Pekurovsky
semanticscholar   +1 more source

The Fourier transforms of Lipschitz functions on certain domains

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1997
The Fourier transforms of certain Lipschitz functions are discussed and compared with the Hankel transforms of these functions and with their Fourier transforms on the Euclidean Cartan Motion group M(n), n≥2.
M. S. Younis
doaj   +1 more source

Thermal characteristics of longitudinal fin with Fourier and non-Fourier heat transfer by Fourier sine transforms

open access: yesScientific Reports, 2021
The quest for high-performance of heat transfer components on the basis of accommodating shapes, smaller weights, lower costs and little volume has significantly diverted the industries for the enhancement of heat dissipation with variable thermal ...
Basma Souayeh, Kashif Ali Abro
doaj   +1 more source

New generalized Fourier transforms and their applications to ordinary, partial and fractional differential equations

open access: yesMiskolc Mathematical Notes
This article presents new generalized definitions of Fourier, Fourier sine, Fourier cosine, inverse Fourier, inverse Fourier sine and inverse Fourier cosine transforms, which encompass various studies on the generalized Fourier transforms in the existing
Enes Ata, İ. Onur Kıymaz
doaj   +1 more source

Fast Computation of Singular Oscillatory Fourier Transforms

open access: yesAbstract and Applied Analysis, 2014
We consider the problem of the numerical evaluation of singular oscillatory Fourier transforms  ∫ab‍x-aαb-xβf(x)eiωxdx, where α>-1  and  β>-1. Based on substituting the original interval of integration by the paths of steepest descent, if f is analytic ...
Hongchao Kang, Xinping Shao
doaj   +1 more source

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