Results 1 to 10 of about 18,096 (200)

Spectra of algebras of block-symmetric analytic functions of bounded type

open access: yesМатематичні Студії, 2022
We investigate algebras of block-symmetric analytic functions on spaces $\ell_{p}(\mathbb{C}^s)$ which are $\ell_{p}$-sums of $\mathbb{C}^{s}.$ We consider properties of algebraic bases of block-symmetric polynomials, intertwining operations on spectra ...
A. Zagorodnyuk, V. V. Kravtsiv
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

Analyticity of sub-Markovian semigroups [PDF]

open access: yesProceedings of the American Mathematical Society, 1995
Summary: Let \(A\) be a generator of a submarkovian semigroup in \(L^2(M, d\mu)\). We investigate the domain of analyticity of \(\exp(- tA)\) in \(L^p(M, d\mu)\). The same problem for the generator perturbed by a potential is considered.
Liskevich, V. A., Perelmuter, M. A.
openaire   +2 more sources

Space–time analytic smoothing effect of the heat semigroup defined on homogeneous Besov spaces

open access: yesPartial Differential Equations in Applied Mathematics, 2021
We refine the decay estimate of the heat semigroup {T(t)}t≥0defined on homogeneous Besov spaces Ḃp,qs(Rn)for s∈R,p,q∈[1,∞], which is obtained by Kozono et al. (2003).
Taiki Takeuchi
doaj   +1 more source

Existence results for neutral evolution equations with nonlocal conditions and delay via fractional operator

open access: yesOpen Mathematics, 2022
In this paper, we study the existence of solutions for the neutral evolution equations with nonlocal conditions and delay in α\alpha -norm, which are more general than in many previous publications.
Zhang Xuping, Sun Pan
doaj   +1 more source

Representation of Quantum Mechanical Resonances in the Lax-Phillips Hilbert Space [PDF]

open access: yes, 1998
We discuss the quantum Lax-Phillips theory of scattering and unstable systems. In this framework, the decay of an unstable system is described by a semigroup.
Aguilar J.   +10 more
core   +3 more sources

Existence of solutions for quasilinear random impulsive neutral differential evolution equation

open access: yesArab Journal of Mathematical Sciences, 2018
This paper deals with the existence of solutions for quasilinear random impulsive neutral functional differential evolution equation in Banach spaces and the results are derived by using the analytic semigroup theory, fractional powers of operators and ...
B. Radhakrishnan, M. Tamilarasi
doaj   +1 more source

Positive Solutions for the Initial Value Problem of Fractional Evolution Equations

open access: yesAbstract and Applied Analysis, 2013
By using the fixed point theorems and the theory of analytic semigroup, we investigate the existence of positive mild solutions to the Cauchy problem of Caputo fractional evolution equations in Banach spaces.
He Yang, Yue Liang
doaj   +1 more source

SOBRE LA ANALITICIDAD DEL SEMIGRUPO Co ASOCIADO A UN SISTEMA VISCOELÁSTICO

open access: yesPesquimat, 2014
We proved that the semigroup C0 associated to a viscoelastic system is analytic and exponentially stable.
Yolanda Silvia Santiago Ayala
doaj   +1 more source

Feller semigroups, Lp-sub-Markovian semigroups, and applications to pseudo-differential operators with negative definite symbols [PDF]

open access: yes, 2001
The question of extending L-p-sub-Markovian semigroups to the spaces L-q, q > P, and the interpolation of LP-sub-Markovian semigroups with Feller semigroups is investigated.
Berlin   +3 more
core   +2 more sources

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