Boundary Value Problem for a Third-Order Differential Equation with a Strong Boundary Layer

Moscow University Computational Mathematics and Cybernetics - A case is considered in which when the solution to the boundary value problem for a third-order singularly perturbed ordinary...     

一类具有转向点的三阶方程边值问题

讨论了一类具有转向点的微分方程边值问题．利用多重尺度等方法,构造了边值问题解一致有效的渐近展开式．     

Conditions for the Hyperbolicity of a Linear Third-Order Differential Equation in a One-Dimensional Space

We study the general linear third-order differential equation with constant real coefficients in the case of two independent variables. Necessary and sufficient coefficient conditions for the hyperbolicity and strict hyperbolicity of the equation, as well as for the representability of the differential operator occurring in the equation in the form of a composition of first-order operators, are obtained.     

一类三阶微分方程边值问题的单调迭代法

用单调迭代法研究一类三阶微分方程边值问题解的存在性,不仅证明了该问题解的存在性,而且得到了其迭代格式.     

三阶微分方程边值问题的高效数值算法

基于再生核空间法提出了一个高效的数值算法来解决三阶微分方程的边值问题.利用再生性以及正交基的构造,得到了模型精确解的级数表示形式,并通过截断级数获得了其近似解.通过数值算例说明了此方法的有效性.     

Abstract Differential Equation with a Spectral Parameter in the Boundary Conditions

In the present paper, we first establish a coerciveness estimate with respect to both the space variable and the spectral parameter of a boundary-value problem for an operator differential equation with nonlocal boundary conditions containing the spectral parameter. Then, using the coerciveness estimate, we prove that the operator generated by this problem is a Fredholm, and, moreover is an isomorphism between appropriate spaces. Finally, the results obtained are applied to a class of non local problems for a quasi-elliptic partial differential equation.     

非局部边界条件下的抛物型偏微分方程组

本文首先讨论了一个非局部边界条件下的抛物型偏微分方程组,通过一个变量替换,使得在更宽松的边界假设条件下证明了解的存在唯一性;然后讨论了一个完全非线性的抛物型方程组,同样,通过变量替换证明了比较原理.     

Third Boundary-Value Problem for a Third-Order Differential Equation with Multiple Characteristics

Ukrainian Mathematical Journal - We prove the unique solvability of the third boundary-value problem for a third-order differential equation with multiple characteristics containing the second time...     

Solution of the Mixed Problem for a Third-Order Partial Differential Equation

Mathematical Notes - We consider the initial-boundary value problem for a third-order partial differential equation with highest mixed derivative. An abstract Cauchy problem for a first-order...     

Boundary Value Problems for Third-Order Nonlinear Ordinary Differential Equations

In this paper, we describe how to analyze boundary value problems for third-order nonlinear ordinary differential equations over an infinite interval. Several physical problems of interest are governed by such systems. The seminumerical schemes described here offer some advantages over solutions obtained by using traditional methods such as finite differences, shooting method, etc. These techniques also reveal the analytic structure of the solution function. For illustrative purposes, several physical problems, mainly drawn from fluid mechanics, are considered; they clearly demonstrate the efficiency of the techniques presented here.     

半线性三阶差分方程边值问题的非负解

该文研究了一类半线性三阶差分方程边值问题Δ３ｕ（ｔ）＋ａ（ｔ）ｆ（ｕ（ｔ））＝０,２≤Ｔ≤Ｔ＋２,ｕ（０）＝ｕ（１）＝ｕ（Ｔ＋３）＝０的非负解,得到了该方程在锥与环形域相交部分非负解的存在性,包含、改近和推广了文［３,４,５,６］的主要结果．     

退化椭圆型方程的一个边值问题

本文主要讨论在ｘ 轴上退化的二阶椭圆型偏微分方程的混合边值问题．     

一类分数阶微分方程多点边值问题解的存在性

本文运用Krasnoselskii和Schauder不动点定理,得到了一类分数阶微分方程多点边值问题解的存在性．