Results 21 to 30 of about 10,372 (181)

Singularly perturbed and non-local modulation equations for systems with interacting instability mechanisms [PDF]

open access: yes, 1996
Two related systems of coupled modulation equations are studied and compared in this paper. The modulation equations are derived for a certain class of basic systems which are subject to two distinct, interacting, destabilizing mechanisms. We assume that,
Doelman, A., Rottschafer, V.
core   +3 more sources

A Singularly Perturbed System of Parabolic Equations

open access: yesLobachevskii Journal of Mathematics, 2021
The work is devoted to the construction of the asymptotic behavior of the solution of a singularly perturbed system of equations of parabolic type, in the case when the limit equation has a regular singularity as the small parameter tends to zero. The asymptotics of the solution of such problems contains boundary layer functions.
Omuraliev, A. S., Esengul kyzy, P.
openaire   +3 more sources

Fitted cubic spline in tension difference scheme for two-parameter singularly perturbed delay parabolic partial differential equations

open access: yesPartial Differential Equations in Applied Mathematics, 2023
A numerical study of a two-parameter singularly perturbed time-delay parabolic equation has been initiated. The proposed technique is based on a fitted operator finite difference scheme.
Naol Tufa Negero
doaj   +1 more source

A parameter robust numerical method for a two dimensional reaction-diffusion problem. [PDF]

open access: yes, 2005
In this paper a singularly perturbed reaction-diffusion partial differential equation in two space dimensions is examined. By means of an appropriate decomposition, we describe the asymptotic behaviour of the solution of problems of this kind.
Clavero, C.   +2 more
core   +1 more source

Exponential stability for singularly perturbed systems with state delays

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2000
In this paper the problem of stability of the zero solution of singularly perturbed system of linear differential equation with state delays is investigated.
V. Dragan, A. Ionita
doaj   +1 more source

An exponentially fitted finite difference scheme for a class of singularly perturbed delay differential equations with large delays

open access: yesAin Shams Engineering Journal, 2017
This paper deals with singularly perturbed boundary value problem for a linear second order delay differential equation. It is known that the classical numerical methods are not satisfactory when applied to solve singularly perturbed problems in delay ...
P. Pramod Chakravarthy   +2 more
doaj   +1 more source

Higher order energy expansions for some singularly perturbed Neumann problems [PDF]

open access: yes, 2003
We consider the following singularly perturbed semilinear elliptic problem: \epsilon^{2} \Delta u - u + u^p=0 \ \ \mbox{in} \ \Omega, \quad u>0 \ \ \mbox{in} \ \ \Omega \quad \mbox{and} \ \frac{\partial u}{\partial \nu} =0 \ \mbox{on} \ \partial \
Adimurthi   +22 more
core   +2 more sources

Multiplicity and concentration behaviour of solutions for a fractional Choquard equation with critical growth

open access: yesAdvances in Nonlinear Analysis, 2020
In this paper, we study the singularly perturbed fractional Choquard ...
Yang Zhipeng, Zhao Fukun
doaj   +1 more source

Singularly perturbed critical Choquard equations

open access: yesJournal of Differential Equations, 2017
In this paper we study the semiclassical limit for the singularly perturbed Choquard equation $$ -\vr^2 u +V(x)u =\vr^{ -3}\Big(\int_{\R^3} \frac{Q(y)G(u(y))}{|x-y|^ }dy\Big)Q(x)g(u) \quad \mbox{in $\R^3$}, $$ where ...
Alves, Claudianor   +3 more
openaire   +4 more sources

Exponential Collocation Method for Solutions of Singularly Perturbed Delay Differential Equations

open access: yesAbstract and Applied Analysis, 2013
This paper deals with the singularly perturbed delay differential equations under boundary conditions. A numerical approximation based on the exponential functions is proposed to solve the singularly perturbed delay differential equations.
Şuayip Yüzbaşı, Mehmet Sezer
doaj   +1 more source

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