Results 71 to 80 of about 31,809 (190)

Approximate controllability of quasilinear functional differential equations

open access: yesElectronic Journal of Differential Equations, 2019
In this article, we study the approximate controllability for quasilinear differential equations with deviating arguments in a Hilbert space. We establish sufficient conditions for the existence of a mild solution. We also obtain sufficient conditions
Duranta Chutia, Rajib Haloi
doaj  

Approximate Controllability of Abstract Discrete-Time Systems

open access: yesAdvances in Difference Equations, 2010
Approximate controllability for semilinear abstract discrete-time systems is considered. Specifically, we consider the semilinear discrete-time system , , where are bounded linear operators acting on a Hilbert space , are -valued bounded linear ...
Hernán R. Henríquez   +1 more
doaj   +2 more sources

Boundary Controllability of a Pseudoparabolic Equation

open access: yesAbstract and Applied Analysis, 2013
We deal with the controllability problem for the pseudoparabolic equation by means of boundary controls. Due to the unusual spectrum of this kind of equations, we prove that the null controllability property is false.
Qiang Tao, Hang Gao, Zheng-an Yao
doaj   +1 more source

Remarks on global controllability for the shallow-water system with two control forces [PDF]

open access: yes, 2012
In this paper we deal with the compressible Navier-Stokes equations with a friction term in one dimension on an interval. We study the exact controllability properties of this equation with general initial condition when the boundary control is acting at
Drici, Abdelmalek, Haspot, Boris
core   +2 more sources

Indirect controllability of some linear parabolic systems of m equations with m − 1 controls involving coupling terms of zero or first order

open access: yes, 2015
International audienceThis paper is devoted to the study of the null and approximate controllability for some classes of linear coupled parabolic systems with less controls than equations. More precisely, for a given bounded domain Ω in R N (N ∈ N *), we
Duprez, Michel, Lissy, Pierre
core   +6 more sources

Solvability of control problem for fractional nonlinear differential inclusions with nonlocal conditions

open access: yesNonlinear Analysis, 2019
In this paper, we study the approximate controllability of nonlocal fractional differential inclusions involving the Caputo fractional derivative of order q ∈ (1,2) in a Hilbert space.
Alka Chadha   +2 more
doaj   +1 more source

On Local and Controlled Approximation Order

open access: yesJournal of Approximation Theory, 1993
The authors deal with approximations to smooth functions by objects which are essentially discrete convolutions. The purpose is to get error estimates for approximation power of dilates of these convolutions in terms of the dilation parameter \(h\).
Halton, E.J., Light, W.A.
openaire   +1 more source

Finite approximate controllability for semilinear heat equations in noncylindrical domains

open access: yesAnais da Academia Brasileira de Ciências, 2004
We investigate finite approximate controllability for semilinear heat equation in noncylindrical domains. First we study the linearized problem and then by an application of the fixed point result of Leray-Schauder we obtain the finite approximate ...
Menezes Silvano B. de   +2 more
doaj  

Existence and approximate controllability of Hilfer fractional evolution equations with almost sectorial operators

open access: yesAdvances in Difference Equations, 2020
In this article, we are concerned with the existence of mild solutions and approximate controllability of Hilfer fractional evolution equations with almost sectorial operators and nonlocal conditions.
Pallavi Bedi   +4 more
doaj   +1 more source

Approximate controllability of abstract impulsive fractional neutral evolution equations with infinite delay in Banach spaces

open access: yesElectronic Journal of Differential Equations, 2013
In this article, we study the approximate controllability of impulsive abstract fractional neutral evolution equations in Banach spaces. The main results are obtained by using Krasnoselkii's fixed point theorem, fractional calculus and methods of ...
Dimplekumar N. Chalishajar   +2 more
doaj  

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