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1.
THE SINGULARLY PERTURBED BOUNDARY VALUE PROBLEM OF NONLINEAR INTEGRO-DIFFERENTIAL SYSTEM 总被引:10,自引:0,他引:10
唐荣荣 《Annals of Differential Equations》2004,20(4):407-412
In this paper, using the differential inequality and singularly perturbed theory, the singularly perturbed boundary value problems for nonlinear integro-differential system has been studied. Under some appropriate assumptions, the existence of solution has been proved and the uniform validness of the asymptotic expansions for arbitrary nth-order have been obtained simply and conveniently. 相似文献
2.
§ 1 IntroductionA class of singularly perturbed boundary value problems were studied by Mo[1~ 6] .Now we consider the following singularly perturbed nonlinear boundary value problem ofthe formεd2 ydx2 =f(x,y,y′) , 0 相似文献
3.
Considerthesingularlyperturbednonlinearproblemfory~(y,?'...7/.)"oftheformwhereTy=(Tlyll'..5Tny.)'(Tdenotestransposition)whileEisasmallpositiveparameter,f=(fi,...?fn)",g=(gi,...,g.)',A=(Al,''tA.)',B=(BI,'',B.)'anda20,b20,a 5>0.Manyant,horssuchasHowes[1],… 相似文献
4.
本文是讨论一类在局部区域上的奇摄动非线性Robin边值问题。利用算子理论和不动点原理,得到了相应问题解的存在性和唯一性。 相似文献
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§ 1 IntroductionSince 1 970 the perturbed boundary value problems for functional differential equationshave been derived in many fields,such as biology,physics,optimal control and e-conomies[1 ] .Some works on studying it have appeared,for example references[2~ 6] .Inthis paper,we study a kind of singularly perturbed boundary value problems for Volterrafunctional differential equations:εx″(t) =f(t,x(t) ,[Tx] (t) ,x(t-τ) ,x′(t) ,ε) ,t∈ (0 ,1 ) ,(1 )x(t) =φ(t,ε) ,t∈ [-τ,0 ] ,ax(1 )… 相似文献
7.
《数学物理学报(B辑英文版)》1999,19(5):589-597
This paper investigates the boundary value problems for a class of singularly perturbed nonlinear elliptic equations. By means of the theory of partial differential inequalities the author obtains the existence and asymptotic estimation of the solutions, involving the boundary and interior layer behavior, of the problems as described. 相似文献
8.
唐荣荣 《Annals of Differential Equations》2004,20(3):278-282
In this paper, a class of strongly nonlinear singularly perturbed interior layer problems are considered by the theory of differential inequalities and the corrective theory of interior layer. The existence of solution is proved and the asymptotic behavior of solution for the boundary value problems are studied. And the satisfying result is obtained. 相似文献
9.
Considerasingularlyperturbedproblemforhigherorderselnilinearequationswhereeisasmallpositiveparameter,ndenotesaboundedregioninRe,whereonsignifiesasmoothboundaryofn,misaintegerandjk,gi,k,j=0,'',in--1,aresufficientlysmoothfunctionswithregardtotheirvariablesincorrespondenceranges.Modealwiththesingularperturbationforthesecondorder'ellipticequations[1],[2],thefourthorderequations[3]l[4]andaclassofhigherorderequations[5].Inthispaperttheauthorsconsiderthesingularperturbationforevenmoregeneralhigheror… 相似文献
10.
非线性积分微分方程组奇摄动边值问题 总被引:2,自引:0,他引:2
本文讨论含积分算子的非线性微分方程组Robin边值问题的奇摄动,在适当假设条件下通过对角化技巧,利用逐步逼近法证明了解的存在,并得到直到O(ε^N+1)的按范数界限的一致有效估计。 相似文献
11.
莫嘉琪 《Annals of Differential Equations》2004,20(4):396-401
A class of nonlinear nonlocal singularly perturbed boundary value problems for elliptic equation with boundary perturbation is considered. Under suitable conditions, firstly, the outer solution of the original problem is obtained, secondly, using the stretched variable, the composing expansion method and the expanding theory of power series, the boundary layer is constructed, finally, using the theory of differential inequalities the asymptotic behavior of solution for the boundary value problems is studied and educing some relational inequalities the existence and uniqueness of solution for the original problem and the uniformly valid asymptotic estimation is discussed. 相似文献
12.
1IntroductionManyauthorshavedealtwiththeboundaryvalueproblemsofsecondorthirdorderdifferentialequationwithaturningpoint[l-5],butthatwithtwoormoreturningpointsisscarcelydiscussed.ThispaperconcernsthefollowingboundaryvalueproblemwhereE>0isasmallparameter,0,I… 相似文献
13.
本文研究了催化反应非线性奇摄动边值问题.利用微分不等式理论和方法,得到了问题的解的任意次近似渐近估计. 相似文献
14.
本文研究了一类具有非局部边界条件的奇摄动半线性椭圆型方程边值问题。在适当的条件下,利用比较定理讨论了问题解的渐近性态。 相似文献
15.
A CLASS OF NONLINEAR PREDATOR-PREY SINGULARLY PERTURBED ROBIN PROBLEMS FOR REACTION DIFFUSION SYSTEM
A class of nonlinear predator-prey singularly perturbed Robin problems for reaction diffusion systems are considered. Under suitable conditions, using the theory of differential inequalities the existence and asymptotic behavior of solution for the initial boundary value problems are studied. 相似文献
16.
Ouyang Cheng Mo Jiaqi 《Annals of Differential Equations》2005,21(2):177-182
The nonlinear singularly perturbed problems for reaction diffusion equations with boundary perturbation are considered. Under suitable conditions, using the theory of differential inequalities the asymptotic behavior of solution for the initial boundary value problems is studied. 相似文献
17.
本文研究了不满足Tikhnov定理中稳定性要求的一类常微分方程奇摄动边值问题.利用边界层函数法以及微分不等式理论,分别构造了渐进解的形式和证明了解的存在性和渐近解一致有效性并进行了余项估计,得出了该类问题边界层代数式衰减的结论. 相似文献
18.
具有转向点的奇摄动非线性边值问题的非单调内部层性质 总被引:9,自引:0,他引:9
刘树德 《高校应用数学学报(A辑)》1994,(2):146-153
本文在fy(0,y,y')=0(对所有y,y'),即f在t=0具有转向点的主要假设下研究非线性奇摄动问题εy''=f(t,y,y'),y(-1,ε)=B,对充分小的ε>0,建立了在转向点t=0呈两类非单调向部层(尖层或非单调过渡层)性态的解的存在性准则。 相似文献
19.
《Annals of Differential Equations》2012,(2):180-185
A class of singularly perturbed problem of third order equation with two para-meters is studied. Using singular perturbation method, the structure of solutions to the problem is discussed in three different cases about two small parameters. The asymptotic solutions to the problem are given. The structure of solutions and the different limit behaviors are revealed. And the solutions are compared with the exact solutions to the equation in which the coefficients are constants and a relatively more perfect res... 相似文献
20.
谢峰 《Annals of Differential Equations》2002,(4)
In this paper, a class of singular perturbation of boundary value problem for nonlinear second order ordinary differential equation involving two parameters is considered. For the three cases ε/μ→0(μ→0), μ2/ε→0(ε→0) and ε=μ2, uniformly valid asymptotic solutions are obtained using the method of two steps expansions and a fixed-point theorem. 相似文献