Results 11 to 20 of about 154 (124)

A Class of Semilinear Parabolic Problems and Analytic Semigroups

open access: yesMathematics, 2022
(1) Background: This paper is devoted to the study of a class of semilinear initial boundary value problems of parabolic type. (2) Methods: We make use of fractional powers of analytic semigroups and the interpolation theory of compact linear operators ...
Kazuaki Taira
doaj   +1 more source

Operator calculus on the class of Sato’s hyperfunctions

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2013
We construct a functional calculus for generators of analytic semigroups of operators on a Banach space. The symbol class of the calculus consists of hyperfunctions with a compact support in $[0,\infty)$.
M.I. Patra, S.V. Sharyn
doaj   +3 more sources

Parameter–Elliptic Fourier Multipliers Systems and Generation of Analytic and C Semigroups

open access: yesMathematics, 2022
We consider Fourier multiplier systems on Rn with components belonging to the standard Hörmander class S1,0mRn, but with limited regularity. Using a notion of parameter-ellipticity with respect to a subsector Λ⊂C (introduced by Denk, Saal, and Seiler) we
Bienvenido Barraza Martínez   +3 more
doaj   +1 more source

Mild Solutions to the Cauchy Problem for Some Fractional Differential Equations with Delay

open access: yesAxioms, 2017
In this paper, we present new existence theorems of mild solutions to Cauchy problem for some fractional differential equations with delay. Our main tools to obtain our results are the theory of analytic semigroups and compact semigroups, the Kuratowski ...
Jin Liang, Yunyi Mu
doaj   +1 more source

On the stochastic Allen–Cahn equation on networks with multiplicative noise

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
We consider a system of stochastic Allen–Cahn equations on a finite network represented by a finite graph. On each edge in the graph a multiplicative Gaussian noise driven stochastic Allen–Cahn equation is given with possibly different potential barrier ...
Mihály Kovács, Eszter Sikolya
doaj   +1 more source

A characterization of the generators of analytic C0-semigroups in the class of scalar type spectral operators

open access: yesAbstract and Applied Analysis, 2004
In the class of scalar type spectral operators in a complex Banach space, a characterization of the generators of analytic C0-semigroups in terms of the analytic vectors of the operators is found.
Marat V. Markin
doaj   +1 more source

On the global existence of mild solutions of nonlinear delay systems associated with continuous and analytic semigroups

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2008
In this paper we prove sufficient conditions for the existence of global solutions of nonlinear functional-differential evolution equations whose linear parts are infinitesimal generators of strongly continuous and analytic semigroups.
Milan Medved
doaj   +1 more source

Dynamics of semigroups generated by analytic functions of the Laplacian on Homogeneous Trees

open access: yesComptes Rendus. Mathématique, 2023
Let $\Psi $ be a non-constant complex-valued analytic function defined on a connected, open set containing the $L^p$-spectrum of the Laplacian $\mathcal{L}$ on a homogeneous tree.
Kumar, Pratyoosh, Rano, Sumit Kumar
doaj   +1 more source

Existence and Uniqueness of Nonmonotone Solutions in Porous Media Flow

open access: yesAxioms, 2022
Existence and uniqueness of solutions for a simplified model of immiscible two-phase flow in porous media are obtained in this paper. The mathematical model is a simplified physical model with hysteresis in the flux functions.
Rouven Steinle   +3 more
doaj   +1 more source

Corrigendum to "On the stochastic Allen–Cahn equation on networks with multiplicative noise" [Electron. J. Qual. Theory Differ. Equ. 2021, No. 7, 1–24]

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
We reprove Proposition 3.8 in our paper that was published in [Electron. J. Qual. Theory Differ. Equ. 2021, No. 7, 1–24], to fill a gap in the proof of Corollary 3.7 where the denseness of one of the embeddings does not follow by the original arguments ...
Mihály Kovács, Eszter Sikolya
doaj   +1 more source

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