Results 11 to 20 of about 451,129 (278)

Almost periodic processes and the existence of almost periodic solutions [PDF]

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 1998
Some property which is equivalent to the concept of an asymptotically almost periodic integral for almost periodic processes is introduced. By using this property, it is shown that a precompact integral of almost periodic processes which is uniformly ...
Y. Hino, Satoru Murakami
doaj   +8 more sources

Almost Periodic and Asymptotically Almost Periodic Solutions of Liénard Equations [PDF]

open access: yesDiscrete & Continuous Dynamical Systems - B, 2011
The aim of this paper is to study the almost periodic and asymptotically almost periodic solutions on (0,+1) of the Li´enard equation x′′ + f(x)x′ + g(x) = F(t), where F : T !
B. A. Shcherbakov   +16 more
core   +4 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   +3 more sources

$C^n$-almost periodic and almost periodic solutions for some nonlinear integral equations

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2012
In this paper, we investigate the existence of $C^n$-almost periodic solution for a class of nonlinear Fredholm integral equations, and the existence of almost periodic solution for a class of nonlinear functional integral equations.
Huisheng Ding   +2 more
doaj   +3 more sources

Existence of pseudo almost periodic solutions to some classes of partial hyperbolic evolution equations [PDF]

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2007
The paper examines the existence of pseudo almost periodic solutions to some classes of partial hyperbolic evolution equations. Namely, some sufficient conditions for the existence and uniqueness of pseudo almost periodic solutions to those classes of ...
Toka Diagana
doaj   +6 more sources

New criteria for the existence of periodic and almost periodic solutions for some evolution equations in Banach spaces [PDF]

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2004
In this work we give a new criteria for the existence of periodic and almost periodic solutions for some differential equation in a Banach space. The linear part is nondensely defined and satisfies the Hille-Yosida condition.
Khalil Ezzinbi, M. Jazar
doaj   +4 more sources

Investigation for periodic and almost periodic solutions of first-order ordinary differential equations [PDF]

open access: yesE3S Web of Conferences, 2023
Approaches to estimating for the number of periodic and almost periodic solutions of ordinary differential equations are considered. Conditions that allow determinating both the upper and lower bounds for these solutions are found.
Alferov G., Ivanov G., Korolev V.
doaj   +1 more source

Non-almost periodic solutions of limit periodic and almost periodic homogeneous linear difference systems

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2015
We study limit periodic and almost periodic homogeneous linear difference systems. The coefficient matrices of the considered systems are taken from a given commutative group.
Martin Chvátal
doaj   +1 more source

Asymptotically almost periodic solutions of limit and almost periodic linear difference systems

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2015
In this paper, limit periodic and almost periodic homogeneous linear difference systems are considered. We study the systems in which the coefficient matrices are taken from a given bounded group and the elements of the matrices are from an infinite ...
Martin Chvátal
doaj   +1 more source

Almost periodic solutions of Poisson’s equation [PDF]

open access: yesProceedings of the American Mathematical Society, 1971
It is well known that if f ( t ) f(t) is almost periodic with respect to a real variable t t , and if F ( t ) = ∫ t f ( s ) d s F(t) = {\smallint ^t}f(s)
openaire   +1 more source

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