Results 21 to 30 of about 276 (127)

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

Universality and ultradifferentiable functions: Fekete’s theorem [PDF]

open access: yesProceedings of the American Mathematical Society, 2010
The purpose of this article is to establish extensions of Fekete’s Theorem concerning the existence of universal power series of C
Mouze, Augustin, Nestoridis, V.
openaire   +1 more source

Operator representation of Gevrey ultradistributions algebra with supports on positive $n$-dimensional angle

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2013
The representation of convolution Gevrey algebra of ultradistributions as commutant of the $n$-parametric strongly continuous semigroup of shifts in algebra of linear and continuous mappings over the space of ultradifferentiable Gevrey functions with ...
A. V. Solomko
doaj   +1 more source

Superposition in Classes of Ultradifferentiable Functions

open access: yesPublications of the Research Institute for Mathematical Sciences, 2006
We present a complete characterization of the classes of ultradifferentiable functions that are holomorphically closed. Moreover, we show that any class holomorphically closed is also closed under composition (now without restrictions on the number of variables).
Fernández, Carmen, Galbis, Antonio
openaire   +2 more sources

The Problem of Iterates in Some Classes of Ultradifferentiable Functions [PDF]

open access: yes, 2015
We consider the problem of iterates in some spaces of ultradifferentiable classes in the sense of Braun, Meise and Taylor. In particular, we obtain a microlocal version, in this setting of functions, of the ``Theorem of the iterates of Kotake and ...
David Jornet, BOITI, Chiara
core   +1 more source

Application of the functional calculus to solving of infinite dimensional heat equation

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2016
In this paper we study infinite dimensional heat equation associated with the Gross Laplacian. Using the functional calculus method, we obtain the solution of appropriate Cauchy problem in the space of polynomial ultradifferentiable functions.
S.V. Sharyn
doaj   +1 more source

On a class of ultradifferentiable functions

open access: yesNovi Sad Journal of Mathematics, 2015
Summary: We introduce a class of ultradifferentiable functions which contains Gevrey functions and study its basic properties. In particular, we investigate the continuity properties of certain (ultra)differentiable operators. Finally, we discuss microlocal properties in appropriate dual spaces.
Pilipović, Stevan   +2 more
openaire   +1 more source

Real Paley-Wiener theorems in spaces of ultradifferentiable functions [PDF]

open access: yes, 2020
[EN] We develop real Paley-Wiener theorems for classes S-omega of ultradifferentiable functions and related L-p-spaces in the spirit of Bang and Andersen for the Schwartz class. We introduce results of this type for the so-called Gabor transform and give
Jornet Casanova, David   +5 more
core   +1 more source

Quantizations and Global Hypoellipticity for Pseudodifferential Operators of Infinite Order in Classes of Ultradifferentiable Functions [PDF]

open access: yes, 2022
[EN] We study the change of quantization for a class of global pseudodifferential operators of infinite order in the setting of ultradifferentiable functions of Beurling type.
Asensio López, Vicente
core   +1 more source

Comment on “On the Carleman Classes of Vectors of a Scalar Type Spectral Operator”

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2018, Issue 1, 2018., 2018
The results of three papers, in which the author inadvertently overlooks certain deficiencies in the descriptions of the Carleman classes of vectors, in particular the Gevrey classes, of a scalar type spectral operator in a complex Banach space established in “On the Carleman Classes of Vectors of a Scalar Type Spectral Operator,” Int. J. Math.
Marat V. Markin, Yuri Latushkin
wiley   +1 more source

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