Results 21 to 30 of about 13,185 (200)

A Class of Shock Wave Solution to Singularly Perturbed Nonlinear Time-Delay Evolution Equations

open access: yesShock and Vibration, 2020
Nonlinear singularly perturbed problem for time-delay evolution equation with two parameters is studied. Using the variables of the multiple scales method, homogeneous equilibrium method, and approximation expansion method from the singularly perturbed ...
Yi-Hu Feng, Lei Hou
doaj   +1 more source

A High-Order Method for Stiff Boundary Value Problems with Turning Points [PDF]

open access: yes, 1987
This paper describes some high-order collocation-like methods for the numerical solution of stiff boundary-value problems with turning points. The presentation concentrates on the implementation of these methods in conjunction with the implementation of ...
Brown, David L., Lorenz, Jens
core   +1 more source

Robust numerical method for singularly perturbed differential equations with large delay

open access: yesDemonstratio Mathematica, 2021
In this paper, a singularly perturbed differential equation with a large delay is considered. The considered problem contains a large delay parameter on the reaction term. The solution of the problem exhibits the interior layer due to the delay parameter
Abdulla Murad Ibrahim   +2 more
doaj   +1 more source

On $q-$Gevrey asymptotics for singularly perturbed $q-$difference-differential problems with an irregular singularity [PDF]

open access: yes, 2011
We study a $q-$analog of a singularly perturbed Cauchy problem with irregular singularity in the complex domain which generalizes a previous result by S. Malek in \cite{malek}. First, we construct solutions defined in open $q-$spirals to the origin.
Lastra, Alberto, Malek, Stéphane
core   +6 more sources

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

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

Nonexistence of Global Solutions to the Initial Boundary Value Problem for the Singularly Perturbed Sixth-Order Boussinesq-Type Equation

open access: yesJournal of Applied Mathematics, 2014
We are concerned with the singularly perturbed Boussinesq-type equation including the singularly perturbed sixth-order Boussinesq equation, which describes the bidirectional propagation of small amplitude and long capillary-gravity waves on the surface ...
Changming Song, Jina Li, Ran Gao
doaj   +1 more source

Singularly Perturbed Quadratically Nonlinear Dirichlet Problems [PDF]

open access: yesTransactions of the American Mathematical Society, 1986
The Dirichlet problem for singularly perturbed elliptic equations of the form ε Δ u = A ( x , u ) ∇ u ⋅ ∇ u + B ( x ,
openaire   +2 more sources

Existence and Concentration Behavior of Solutions of the Critical Schrödinger–Poisson Equation in R3

open access: yesMathematics, 2021
In this paper, we study the singularly perturbed problem for the Schrödinger–Poisson equation with critical growth. When the perturbed coefficient is small, we establish the relationship between the number of solutions and the profiles of the ...
Jichao Wang, Ting Yu
doaj   +1 more source

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