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SINGULARLY PERTURBED BOUNDARY VALUE PROBLEMS FOR SEMI-LINEAR RETARDED DIFFERENTIAL EQUATIONS WITH NONLINEAR BOUNDARY CONDITIONS
作者姓名:任景莉  葛渭高
作者单位:Department of Mathematics,Beijing Institute of Technology,Department of Mathematics,Zhengzhou University Beijing 100081,P.R.China,Department of Mathematics,Zhengzhou University,Zhengzhou 450052,P.R.China,Zhengzhou 450052,P.R.China
基金项目:theNationalNaturalScienceFoundationofChina (1 9871 0 0 5)
摘    要:IntroductionInthispaper,westudiedakindofboundaryvalueproblems (BVPs)forsemi_linearretardeddifferentialequationwithnonlinearboundarycondition :    εx″(t) =f(t,x(t) ,x(t-ε) ,ε) ,  t∈(0 ,1 ) ,(1 )    x(t) =φ(t,ε) , t∈-ε0 ,0 ] ,h(x(1 ) ,x′(1 ) ,ε) =A(ε) ,(2 )whereε>0isasmallparameterandε0 isasufficientlysmallpositiveconstant.ThereweremanyresultsofstudyingonsingularlyperturbedboundaryvalueproblemforretardeddifferentialequationinRefs.1~5] .Butthosestudiespossessedanesse…

收稿时间:19 April 2001

Singularly perturbed boundary value problems for semi-linear retarded differential equations with nonlinear boundary conditions
Jing-li,Ren,Wei-gao,Ge.SINGULARLY PERTURBED BOUNDARY VALUE PROBLEMS FOR SEMI-LINEAR RETARDED DIFFERENTIAL EQUATIONS WITH NONLINEAR BOUNDARY CONDITIONS[J].Applied Mathematics and Mechanics(English Edition),2003,24(12):1450-1455.
Authors:Jing-li  Ren  Wei-gao  Ge
Institution:1. Department of Mathematics, Beijing Institute of Technology, Beijing 100081, P.R. China;Department of Mathematics, Zhengzhou University, Zhengzhou 450052, P.R. China
2. Department of Mathematics, Beijing Institute of Technology, Beijing 100081, P.R. China
Abstract:A boundary value problems for functional differenatial equations, with nonlinear boundary condition, is studied by the theorem of differential inequality. Using new method to construct the upper solution and lower solution, sufficient conditions for the existence of the problems' solution are established. A uniformly valid asymptotic expansions of the solution is also given.
Keywords:singular perturbation  functional differential equation  boundary value problem  uniformly valid asymptotic expansion
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