Results 41 to 50 of about 152 (97)

Translaciono invarijantni Banahovi prostori distribucija i granične vrednosti preko integralne transformacije [PDF]

open access: yes, 2015
We use common notation ∗ for distribution (Scshwartz), (Mp) (Beurling) i {Mp} (Roumieu) setting. We introduce and study new (ultra) distribution spaces, the test function spaces D∗E  and their strong duals D'∗E’*.These spaces generalize the spaces D∗Lq ,
Димовски, Павел
core  

On the Gevrey ultradifferentiability of weak solutions of an abstract evolution equation with a scalar type spectral operator on the open semi-axis [PDF]

open access: yesOpen Mathematics, 2019
Abstract Given the abstract evolution equation $$\begin{array}{} \displaystyle y'(t)=Ay(t),\, t\ge 0, \end{array}$$ with scalar type spectral operator A in a complex Banach space, found are conditions necessary and sufficient for all weak solutions of the equation, which a priori need not be strongly differentiable, to be strongly Gevrey ...
openaire   +3 more sources

Extension of Localisation Operators to Ultradistributional Symbols With Super-Exponential Growth

open access: yes
In the Gelfand-Shilov setting, the localisation operator $A^{\varphi_1,\varphi_2}_a$ is equal to the Weyl operator whose symbol is the convolution of $a$ with the Wigner transform of the windows $\varphi_2$ and $\varphi_1$. We employ this fact, to extend
Pilipović, Stevan   +2 more
core   +1 more source

On the Gevrey ultradifferentiability of weak solutions of an abstract evolution equation with a scalar type spectral operator of orders less than one [PDF]

open access: yesOpen Mathematics, 2019
Abstract It is shown that, if all weak solutions of the evolution equation $$\begin{array}{} \displaystyle y'(t)=Ay(t),\, t\ge 0, \end{array} $$ with a scalar type spectral operator A in a complex Banach space are Gevrey ultradifferentiable of orders less than one, then the operator A is necessarily bounded.
openaire   +4 more sources

On Kernels of Convolution Operators in the Roumieu Spaces of Ultradifferentiable Functions

open access: yesВладикавказский математический журнал
В работе исследуются операторы свертки в пространствах Румье ультрадифференцируемых функций нормального типа на числовой прямой. К данному классу пространств относятся известные классы Жевре. В качестве частных случаев операторы свертки включают в себя дифференциальные операторы бесконечного порядка с постоянными коэффициентами, дифференциально ...
openaire   +2 more sources

Hypoellipticity of analytic differential operators in general ultradifferentiable classes

open access: yes
We show that analytic pseudodifferential and Fourier integral operators behave well for ultradifferentiable classes satisfying minimal regularity properties. As an application we investigate the ultradifferentiable regularity properties of several examples of analytic differential operators.
openaire   +2 more sources

On the Carleman ultradifferentiable vectors of a scalar type spectral operator

open access: yes, 2016
Published in Methods of Functional Analysis and Topology (MFAT), available at http://mfat.imath.kiev.ua/article/?id=838.
openaire   +2 more sources

Direct proof of the perfect block diagonalization of systems of pseudo-differential operators in the ultradifferentiable classes

open access: yesKyoto Journal of Mathematics, 2000
The author gives a direct proof of the perfect block diagonalization of systems of pseudo-differential operators in the ultradifferentiable classes. The same result was already proved by a successive approximation, but not directly.
openaire   +3 more sources

The Baouendi-Treves approximation Theorem for Gevrey classes and applications

open access: yes, 2019
In this work we show how to extend the seminal Baouendi-Treves approximation theorem for Gevrey functions and ultradistributions. As applications we present a Gevrey version of the approximate Poincar\'e Lemma and study ultradistributions vanishing on ...
Hoepfner, Gustavo   +2 more
core  

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