Results 1 to 10 of about 90 (84)

Wilson Bases and Ultradistributions [PDF]

open access: yesAxioms, 2021
We provide a characterization of the Gelfand–Shilov-type spaces of test functions and their dual spaces of tempered ultradistributions by means of Wilson bases of exponential decay.
Nenad Teofanov
doaj   +3 more sources

Characterization of Wave Fronts of Ultradistributions Using Directional Short-Time Fourier Transform

open access: yesAxioms, 2021
In this paper we give a characterization of Sobolev k-directional wave front of order p∈[1,∞) of tempered ultradistributions via the directional short-time Fourier transform.
Sanja Atanasova   +2 more
exaly   +3 more sources

Cauchy and Poisson Integral of the Convolutor in Beurling Ultradistributions of Lp-Growth

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2014
Let C be a regular cone in ℝ and let TC=ℝ+iC⊂ℂ be a tubular radial domain. Let U be the convolutor in Beurling ultradistributions of Lp-growth corresponding to TC.
Byung Keun Sohn
doaj   +2 more sources

Almost periodic generalized solutions of differential equations [PDF]

open access: yesMathematica Bohemica, 2021
The paper aims to study systems of linear ordinary differential equations in the context of an algebra of almost periodic generalized ultradistributions. Conditions on the existence of generalized solutions are given.
Chikh Bouzar, Fethia Ouikene
doaj   +1 more source

Boundary Values in Ultradistribution Spaces Related to Extended Gevrey Regularity

open access: yesMathematics, 2020
Following the well-known theory of Beurling and Roumieu ultradistributions, we investigate new spaces of ultradistributions as dual spaces of test functions which correspond to associated functions of logarithmic-type growth at infinity.
Stevan Pilipović   +2 more
doaj   +1 more source

Evolution pseudodifferential equations with analytic symbols in spaces of $S$ type

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2021
A nonlocal multipoint by time problem for an evolution equation with a pseudodifferential operator is studied. This operator is treated as an infinite order differentiation operator in generalized spaces of $S$ type. We consider the case when the initial
V.V. Horodets'kyi, O.V. Martynyuk
doaj   +1 more source

Structural theorems for quasiasymptotics of ultradistributions [PDF]

open access: yesAsymptotic Analysis, 2019
We provide complete structural theorems for the so-called quasiasymptotic behavior of non-quasianalytic ultradistributions. As an application of these results, we obtain descriptions of quasiasymptotic properties of regularizations at the origin of ultradistributions and discuss connections with Gelfand–Shilov type spaces.
Lenny Neyt, Jasson Vindas
openaire   +6 more sources

Asymptotically Almost Periodic Generalized Ultradistributions and Application [PDF]

open access: yesSahand Communications in Mathematical Analysis
The paper aims to introduce and study an algebra of asymptotically almost periodic generalized ultradistributions. These generalized ultradistributions contain  asymptotically almost periodic ultradistributions and asymptotically almost periodic ...
Meryem Slimani, Fethia Ouikene
doaj   +1 more source

Analytic ultradistributions [PDF]

open access: yesProceedings of the American Mathematical Society, 1995
A necessary and sufficient condition that an ultradistribution, of Beurling or Roumieu type, which is defined on an open set Ω
openaire   +2 more sources

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