Results 21 to 30 of about 198,977 (286)

Exact observability and controllability for linear neutral type systems [PDF]

open access: yes, 2015
The problem of exact observability is analyzed for a wide class of neutral type systems by an infinite dimensional approach. The duality with the exact controllabil-ity problem is the main tool.
Rabah, Rabah, Sklyar, Grigory
core   +4 more sources

Invariant Measures for Dissipative Dynamical Systems: Abstract Results and Applications [PDF]

open access: yes, 2012
In this work we study certain invariant measures that can be associated to the time averaged observation of a broad class of dissipative semigroups via the notion of a generalized Banach limit.
Chekroun, Micka ël D.   +1 more
core   +1 more source

Existence of periodic solutions for totally nonlinear neutral differential equations with functional delay [PDF]

open access: yesOpuscula Mathematica, 2012
We use a variant of Krasnoselskii's fixed point theorem by T. A. Burton to show that the nonlinear neutral differential equation with functional delay \[x'(t) = -a(t)h(x(t)) +c(t)x'(t-g(t)) + q(t,x(t) x(t-g(t)))\] has a periodic solution.
Ernest Yankson
doaj   +1 more source

Asymptotic stability of a neutral integro-differential equation [PDF]

open access: yesOpuscula Mathematica, 2006
The global stability behavior of a non-autonomous neutral functional integro-differential equation is studied. A sufficient condition for every solution of this equation to tend to zero is given.
Gen-qiang Wang, Sui Sun Cheng
doaj  

On representation varieties of Artin groups, projective arrangements and the fundamental groups of smooth complex algebraic varieties [PDF]

open access: yes, 1997
We prove that for any affine variety S defined over Q there exist Shephard and Artin groups G such that a Zariski open subset U of S is biregular isomorphic to a Zariski open subset of the character variety Hom(G, PO(3))//PO(3). The subset U contains all
Kapovich, Michael, Millson, John
core   +4 more sources

A Note on Existence of Mild Solutions for Second-Order Neutral Integro-Differential Evolution Equations with State-Dependent Delay

open access: yesFractal and Fractional, 2021
This article is mainly devoted to the study of the existence of solutions for second-order abstract non-autonomous integro-differential evolution equations with infinite state-dependent delay.
Shahram Rezapour   +4 more
doaj   +1 more source

Numerical Solutions of Neutral Stochastic Functional Differential Equations [PDF]

open access: yesSIAM Journal on Numerical Analysis, 2008
This paper examines the numerical solutions of neutral stochastic functional differential equations (NSFDEs) $d[x(t)-u(x_t)]=f(x_t)dt+g(x_t)dw(t)$, $t\geq 0$. The key contribution is to establish the strong mean square convergence theory of the Euler-Maruyama approximate solution under the local Lipschitz condition, the linear growth condition, and ...
Wu, Fuke   +2 more
openaire   +2 more sources

Path Integral Approach to the Non-Relativistic Electron Charge Transfer [PDF]

open access: yes, 2001
A path integral approach has been generalized for the non-relativistic electron charge transfer processes. The charge transfer - the capture of an electron by an ion passing another atom or more generally the problem of rearrangement collisions is ...
Berezin F A   +16 more
core   +2 more sources

Differential Transform Algorithm for Functional Differential Equations with Time-Dependent Delays

open access: yesComplexity, 2020
An algorithm using the differential transformation which is convenient for finding numerical solutions to initial value problems for functional differential equations is proposed in this paper.
Josef Rebenda, Zuzana Pátíková
doaj   +1 more source

Numerical Algorithm for Nonlinear Delayed Differential Systems of $n$th Order

open access: yes, 2019
The purpose of this paper is to propose a semi-analytical technique convenient for numerical approximation of solutions of the initial value problem for $p$-dimensional delayed and neutral differential systems with constant, proportional and time varying
Rebenda, Josef, Šmarda, Zdeněk
core   +1 more source

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