An Existence Theorem for Iterative Functional Differential Equations

A local existence theorem is proved for an iterative functional differential equation by means of the Schauder fixed point theorem.     

非线性算子方程迭代解的存在性定理及其应用

在Ｂａｎａｃｈ空间中,利用锥理论和单调迭代方法研究了一类非线性算子方程的解和最小最大耦合解的存在与迭代逼近定理,并应用到Ｂａｎａｃｈ空间中非线性Ｖｏｌｔｅｒｒａ型积分方程和常微分方程的初值问题．     

一类多项式型迭代函数方程在共振点附近的解析解

In this paper existence of local analytic solutions of a polynomial-like iterative functional equation is studied. As well as in previous work, we reduce this problem with the SchrSder transformation to finding analytic solutions of a functional equation without iteration of the unknown function f. For technical reasons, in previous work the constant α given in the Schroder transformation, i.e., the eigenvalue of the linearized f at its fixed point O, is required to fulfill that α is off the unit circle S^1 or lies on the circle with the Diophantine condition. In this paper, we obtain results of analytic solutions in the case of α at resonance, i.e., at a root of the unity and the case of α near resonance under the Brjuno condition.     

一类迭代函数方程组的C^m解的存在性和唯一性

讨论了较为广泛的一类迭代函数方程组G（x,f(x),…,f^n(x),g(x),…,g^n(x))=0 H(x,g(x),…,g^n(x),f(x),…,f^n(x)=0对任x∈J,其中J为实数轴R的连通闭子集,G,H∈C^m(J^2n 1,R),n≥2,对任一个整数m≥0,本在较弱的条件下证明了该方程组的C^m解的存在性和唯一性。     

阶中立型时滞微分方程非振动解的存在性及其迭代逼近

利用Banach压缩映象原理,研究下列n阶中立型时滞微分方程dn/dtn[x(t)+cx(t-T1)+dx(t-T2)]+(-1)(n+1)f(t,x(t-σ1),x(t-σ2),···,x(t-σk))=g(t)的非振动解的存在性,并获得了相应非振动解的迭代逼近序列以及误差估计.     

Existence and Uniqueness of Analytic Solutions of Systems of Iterative Functional Equations

§ 1.Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ａｌｏｎｇｗｉｔｈｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｎｏｎｌｉｎｅａｒｄｙｎａｍｉｃａｌｓｙｓｔｅｍｓ,ｏｎｅｈａｓｐａｉｄａｔｔｅｎｔｉｏｎｔｏｎｏｔｏｎｌｙｔｈｅｌｏｎｇ ｔｉｍｅｂｅｈａｖｉｏｕｒｏｆａｍｏｖｅｍｅｎｔｂｕｔａｌｓｏｉｔｓｐｒｏｃｅｓｓ,ｗｈｉｃｈｔｏｕｃｈｅｓｕｐｏｎｔｈｅｐｒｏｂｌｅｍｏｆｔｈｅｉｎｖｅｒｓｅｏｐｅｒａｔｉｏｎｏｆａｎｉｔｅｒａｔｉｖｅｏｐｅｒａｔｉｏｎ .Ｂｙｉｔｅｒａｔｉｖｅｆｕｎｃｔｉｏｎａｌｅｑｕａｔｉｏｎｓｗｅｍｅａｎｔ…     

On the Existence of Anti-periodic Solutions for Implicit Differential Equations

This paper is devoted to anti-periodic solutions for a class of implicit differential equations with nonmonotone perturbations. The main tools in our study will be the maximal monotone property of the derivative operator with anti-periodic conditions and a convergent approximation procedure.     

关于半线性椭圆型方程爆破解的存在性

文中得到半线性椭圆型方程的爆破问题解的存在性,其中或者是Rn中的有界区域,C3,C4,C5,C6是正常数,并且C5,C3（0,1）．     

Iterative Methods for Boundary Integral Equations

We review some iterative methods for solving boundary integral equations which arise in Dirichlet and Neumann problems for the Helmholtz and Laplace equations. In particular we show how these integral equations may be transformed so that they may be solved by Neumann-Poincare Picard iteration.     

Homotopy Iterative Methods for Polynomial Equations

Globally convergent iterative methods for polynomial equationsf(z)= 0 are obtained. They are derived by modifying iterative functionssuch as Newton, Steffensen, etc., so as to avoid the criticalpoints and ensure the convergence. The modification is realized by the use of a one-parameter embeddingoperator (homotopy) associated with the polynomial.     

线性方程组的异步迭代法

§1.引言 线性代数方程组的求解方法是解决许多科学与工程问题的基础,尤其在有效地使用并行计算机方面,设计合理的并行算法是必不可少的.目前求解此类问题的同步及异步算法已有许多工作,本文考虑的是异步迭代法求解线性系统. 早在60年代就有了异步算法的研究工作,它是作为求解线性系统提出来的.近年来为适应多处理机系统的需要,在该领域中已有很好的理论结果.1969年[1]给出了线性     

On Existence of Solutions of Parametrized Generalized Equations

Set-Valued and Variational Analysis - In this paper we study existence of solutions to the generalized equation 0 ∈ f(p,x) + F(x), where f is a function, F is a set-valued mapping, and p is a...     

On Iterative Methods with Accelerated Convergence for Solving Systems of Nonlinear Equations

We present a modified method for solving nonlinear systems of equations with order of convergence higher than other competitive methods. We generalize also the efficiency index used in the one-dimensional case to several variables. Finally, we show some numerical examples, where the theoretical results obtained in this paper are applied.     

一类非线性奇异微分方程正解的存在性定理

设(i) f(t,u): (0,1)×(0,+∞)→[0,+∞)连续，关于u 单调增加; (ii) 存在函数g:[1,+∞)→(0,+∞),g(b)0,G(t,s)是相应问题的Green函数。     

Superfast Iterative Solvers for Linear Matrix Equations

Superfast algorithms for solving large systems of linear equations are developed on the basis of an original method for multistep decomposition of a linear multidimensional dynamical system. Examples of analytical synthesis of iterative solvers for matrices of the general form and for large numerical systems of linear algebraic equations are given. For the analytical case, it is shown that convergence occurs at the second iteration.     

广义Hammerstein型方程的存在定理

本文利用单调型强制映射满射性和逼近方法建立了广义Ｈａｍｍｅｒｓｔｅｉｎ型方程ｕ＋Ｋ（ｕ）Ｆ（ｕ）＝０解的存在性定理，这里对于实自反Ｂａｎａｃｈ空间Ｘ的共轭空间Ｘ^*的每个ｕ，Ｋ（ｕ）：Ｘ→Ｘ^*是线性映射，Ｆ：Ｘ^*→Ｘ是任一映射．所得结果推广了Ｓｃｈｉｌｉｎｇ，Ｓｒｉｋａｎｔｈ ａｎｄ Ｊｏｓｈｉ等相应的结果     

Iterative Solutions for a Non-monotone BinaryOperator Equations and Operator System of Equations

By using the theory of the cone and partial ordering. It is studied that the existence and uniqueness of solutions for a non-monotone binary operator equation A(x, x)= x and operator system of equations A(x,x)=x,B(x,x)=x in Banach spaces. Where A and B can be decomposed A=A1+A2, B=B1+B2,A1 and B1 are mixed monotone, A2 and B2 are anti-mixed monotone. The results presented here improve and generalize some corresponding results of mixed monotone operator equations.