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51.
本文借助不动点原理,对一类三阶拟线性方程的边值问题的渐近解作了估计,得到了包括边界层在内的任意次近似的一致有效的渐近展开式。 相似文献
52.
Yuji Liu 《Journal of Difference Equations and Applications》2013,19(7):863-877
Sufficient conditions for the existence of at least one periodic solution of two classes of functional difference equations are established, respectively. 相似文献
53.
54.
本文研究一类无限区间上具有Riemann-Liouville 导数的多分数阶非线性微分方程初值问题,在一类加权函数空间上使用Schauder 不动点定理建立了该问题解的存在性和唯一性结果, 举例说明了定理的应用. 相似文献
55.
In this paper, we are concerned with the existence of positive solutions to the superlinear semipositone problem of the nth-order delayed differential system. The main result in this paper generalizes the corresponding result on the second order de-layed differential equation. Our proofs are based on the well-known Guo-Krasnoselskii fixed-point theorem. 相似文献
56.
Generalized variational principles with several arbitrary parameters and the variable substitution and multiplier method 总被引:4,自引:0,他引:4
龙驭球 《应用数学和力学(英文版)》1987,8(7):617-629
The functional transformations of variational principles in elasticity are classified as three patterns: Ⅰ relaxation pattern, Ⅱ augmented pattern and III equivalent pattern.On the basis of pattern Ⅲ, the generalized variational principles with several arbitrary parameters are formulated and their functionals are defined. They are: the generalized principle of single variable u with several parameters, the generalized principle of two variables u, σ with several parameters, the generalized principle of two variables u, ε with several parameters, and the generalized principle of three veriables u, ε, σ with several parameters. From these principles, a series of new forms of equivalent functionals can be obtained. When the values of these parameters are properly chosen, a series of finite element models can be formulated.In this paper, the question of losing effectiveness for Lagrange multiplier method is also discussed. In order to "recover" effectiveness for multiplier method, a modified method, namely, the variable substitution and multiplier method, is proposed. 相似文献
57.
On Implicit Vector Variational Inequalities 总被引:5,自引:0,他引:5
In this paper, we study the existence of solutions of implicit vector variational inequalities for multifunctions. Generalized pseudomonotonicity concepts are introduced. Our results extend and unify corresponding earlier existence results of many authors for vector variational inequalities under the Hausdorff topological vector space setting. 相似文献
58.
王志华 《应用数学和力学(英文版)》1999,20(3):328-331
IntroductionInrecenttenyears,becauseoftheneedofthecontroltheoryandeconomics,thetheoryofdifferentialinclusionshasbeendevelopingfast,andsome~tresultSindifferenhalinclusionshavebeenobtained.Asystematicstudyondifferenhalinclusionscanbefoundin[l].Inordertosuitcontroltheory,thefollowingsendlineardifferentialinclusionswereconsideredin[2~4]:x'(t) Ax(t)6F(t,x(t)),a.e.teI,x(0)=xo'(l)xthereAgeneratesalinearsendgroup(compactorequicolltinuouS),XisasepotleBanachspaCe,I=[0,TiisanintervalofR,F:IxX~Zx\0i… 相似文献
59.
In this paper, we provide an aggregate function homotopy interior point method to solve a class of Brouwer fixed-point problems. Compared with the homotopy method (proposed by Yu and Lin, Appl. Math. Comput., 74(1996), 65), the main adavantages of this method are as follows: on the one hand, it can solve the Brouwer fixed-point problems in a broader class of nonconvex subsets Ω in Rn (in this paper, we let Ω = [x ∈ Rn: gi(x) ≤ 0, i = 1,… ,m]); on the other hand, it can also deal with the subsets Ω with larger amount of constraints more effectively. 相似文献
60.
p-Laplace方程混合边值问题正解的存在性 总被引:2,自引:0,他引:2
翟成波 《应用泛函分析学报》2003,5(2):170-173
运用锥上的不动点理论,讨论了p—Laplace方程混合边值问题正解的存在性。 相似文献