Results 51 to 60 of about 102,915 (146)

Singularly perturbed linear oscillator with piecewise-constant argument

Вестник КазНУ. Серия математика, механика, информатика, 2018
The Cauchy problem for singularly perturbed linear differential equation the second order with piecewise-constant argument is considered in the article.
M. U. Akhmet, M. K. Dauylbayev, A. E. Mirzakulova, N. Atakhan   +3 more
doaj   +1 more source

Reconciling a Small Density Parameter to Inflation

Physics Letters B, 1991
A theoretical model is proposed in which a decaying cosmological constant fills up the gap between Ω = 1 as expected from the inflationary scenario and the observed small value Ω ≲0.1.
Yasunori Fujii, Tsuyoshi Nishioka
openaire   +1 more source

An asymptotic solution for the SIS epidemic model, taking into account migration and diffusion [PDF]

Известия высших учебных заведений: Прикладная нелинейная динамика
The purpose of this work is to propose and investigate a simple and effective model of an epidemic in an animal population that takes into account migration along the plane of both diseased and healthy individuals. Within the framework of this model, the
Rassadin, Aleksandr Eduardovich
doaj   +1 more source

Some estimates for the viscoelastic incompressible Kelvin-Voigt medium

Қарағанды университетінің хабаршысы. Математика сериясы
In this paper, we consider the application of the method of fictitious domains to a viscoelastic incompressible medium based on the Kelvin-Voigt model.
M.M. Bukenov, D.S. Rakisheva
doaj   +1 more source

The Cauchy problem for singularly perturbed higher-order integro-differential equations

Вестник КазНУ. Серия математика, механика, информатика, 2019
The article is devoted to research the Cauchy problem for singularly perturbed higher-order linear integro-differential equation with a small parameter at the highest derivatives, provided that the roots of additional characteristic equation have ...
A. E. Mirzakulova, M. K. Dauylbaev, M. U. Akhmet, A. K. Dzhetpisbaeva   +3 more
doaj   +1 more source

Assessing the Magnitude of the Concentration Parameter in a Simultaneous Equations Model [PDF]

Poskitt and Skeels (2003) provide a new approximation to the sampling distribution of the IV estimator in a simultaneous equations model. This approximation is appropriate when the concentration parameter associated with the reduced form model is small ...
C. L. Skeels, D. S. Poskitt
core  

Study of Stress-Strain State of Long Cracked Multi-Modulus Strip in Bending in Relation to Crack Formation in Tensile Zone of Concrete

Structural Mechanics of Engineering Constructions and Buildings
The problem of strength analysis of a multi-modulus strip, in contradiction to the existing standpoint of essential nonlinearity, may be formulated as a linear problem for a two-layer strip.
Evgeniy M. Zveryaev
doaj   +1 more source

Analysis of Running Waves Stability in the Ginzburg-Landau Equation with Small Diffusion

Моделирование и анализ информационных систем, 2011
We study the local dynamics of the Ginzburg-Landau equation with small diffusion in a neibourhood of running waves. We find necessary conditions of running waves instability and sufficient conditions of their stability.
A. A. Kashchenko
doaj  

Regularization of Nonlinear Volterra Integral Equations of the First Kind with Smooth Data

AppliedMath
The paper investigates the regularization of solutions to nonlinear Volterra integral equations of the first kind, under the assumption that a solution exists and belongs to the space of continuous functions.
Taalaibek Karakeev, Nagima Mustafayeva
doaj   +1 more source

Construction of the solution of the boundary value problem for integro differential equation with a small parameter in highest derivatives

Қарағанды университетінің хабаршысы. Математика сериясы, 2016
The article is devoted to the study analytical formula of solution of boundary value problem with initial jump for a linear integro-diferential equation of n + m order with a small parameter in the highest derivatives.
A.E. Mirzakulova, N. Atakhan
doaj   +1 more source