Banach空间的上带松弛共强制的广义隐式变分包含组

本文在Banach空间上引入和研究了一类带松弛共强制的广义隐式变分包含组（SNSIVI）．使用M增值算子的预解算子技术，我们构造了一类新的迭代算法逼近这类隐式变分包含组，且在q-一致平滑Banach空间上证明了这类迭代算法的收敛性．我们的结果推广和改进了最近的相关工作．     

一类新的广义集值变分包含问题解的辅助序列迭代算法

本文提出并研究了Banach空间中的一类新的广义集值变分包含问题：0∈N（ω，y）＋A（z，v），由集值m-增生映射的预解算子建立了广义集值变分包含与不动点问题的等价性，并利用Nadler定理和辅助序列建立了一些迭代算法，证明了解的存在性和算法的全局收敛性．     

对带误差项的广义集值变分包含的近似点算法

研究一类新的广义集值变分包含：０∈Ｎ（ｗ,ｙ）＋Ａ（ｚ,ｕ）,它包合了近几年许多作者所作的变分包合问题．在实Ｈｉｌｂｅｒｔ空间中,利用极大单调算子的性质,建立了广义集值变分包合和不动点问题间的等价性．利用这种等价性,建立了一些摄动迭代算法,并证明了近似解序列强收敛于精确解．本文的算法和结果改进和一般化了最近许多文章中相应的算法和结果．     

具有双障碍的退缩抛物变分不等式解的存在性和唯一性(英)

本文研究具有双障碍的退缩抛物变分不等式．我们利用罚技巧，有限逼近和先验估计方法，得到一类退缩抛物变分不等式弱解的存在性，并在一定条件之下，建立了弱解的唯一性．本文结论对广泛的一类抛物型变分不等式成立．     

关于非单调算子的变分问题

该文应用有限维逼近的方法讨论了一类非单调算子的变分不等方程，并在所谓的（Ｆ）条件下将锐角原理推广到变分问题之中，从而得到了很一般的解的存在性．     

一类含H-增生算子的广义集值变分包含

首先介绍了Banach空间中的一类含H-增生算子的广义集直变分包含问题（GSVVIP）和广义预解算子方程问题（GREP），并且建立了二者的等价关系．然后分别构造了新的迭代算法来逼近（GSVVIP）的解和（GREP）的解并且证明了其解的存在性以及它们的收敛性结论．     

弹性接触问题的一种新的混合变分形式

1．引言用混合有限元方法求解弹性力学问题,其优点在于可同时求解位移和应力．力学问题的混合变分形式是混合有限元方法的基础．对于弹性接触问题,文献问给出了一种混合变分形式,以及相应的混合有限元分析（也可见[6]）．本文考虑了弹性接触问题的一种新的混合变分形式,它是构造弹性接触问题的另一种混合有限元方法的基础．对于通常的静态弹性力学方程组的边界值（等式情形）问题,熟知可以有二种不同的混合变分形式（例如见门）．第一种混合变分形式中,对位移的求解空间为H‘（刚,对应力的求解空间为L‘（刚;而第二种混合变分形式…     

弹性接触问题的对偶混合有限元分析

１．引言用混合有限元方法求解弹性力学问题,其优点在于可同时求解位移和应力．力学问题的混合变分形式是混合有限元方法的基础．对于弹性接触问题,文献［６］给出了一种混合变分形式,以及相应的混合有限元分析（也可见［１０］）．其混合变分形式是直接从位移交分方程和Ｈｏｏｋ方程导出的,获得了应力ａ在Ｌ２（Ω）而位移、在Ｈ１（Ω）的一个闭凸子集上求解的混合变分问题．本文在［９］中提出的混合变分形式的基础上,再引入另一个Ｌａｐｒａｎｇｅ乘子,获得了三重组混合变分形式．它能同时求解物体内点的应力,位移和接触边界上的…     

树上生灭过程的Dirichlet特征值估计

本文给出树上两类非常返的生灭过程的第一Dirichlet特征值的变分公式．一类是配称测度有限时,给出以根为吸收点的Dirichlet特征值的变分公式;另一类是配称测度无限时,给出树上生灭过程的Dirichlet主特征值的变分公式．     

解含非线性源项的变分不等式问题的非重叠区域分解法

１．引言 近十几年来,变分不等式区域分解算法方面的研究取得了很多成果．特别是重叠型区域分解法方面的研究更是硕果累累,读者可参阅［１－８］等文献．而非重叠型区域分解法方面的研究目前相关结论不多,只有文献［９］针对线性算子单障碍问题提出了一类多子域非重叠区域分解算法（该方法的基本思想来自于工程中早已运用的子结构法）,证明了它的收敛性,并给出了收敛速度分析． 本文将针对含非线性源项的变分不等式问题提出一类多子域非重叠区域分解算法,并给出其收敛性和收敛速度分析． ２．问题及其有限元逼近 设ｎ为ＲＺ中有界凸多…     

一些差分-复合函数方程的亚纯解

利用Nevanlinna值分布理论,我们主要讨论了两类复差分-复合函数方程和一类复差分-复合函数方程组的超越亚纯解的存在性和特征估计,得到了几个结果.一些例子表明了定理中的条件是精确的.     

Iterative solutions to the extended Sylvester-conjugate matrix equations

This paper is concerned with iterative solutions to a class of complex matrix equations. By applying the hierarchical identification principle, an iterative algorithm is constructed to solve this class of complex matrix equations. The range of the convergence factor is given to guarantee that the proposed algorithm is convergent for arbitrary initial matrix by applying a real representation of a complex matrix as a tool. By using some properties of the real representation, a sufficient convergence condition that is easier to compute is also given by original coefficient matrices. Two numerical examples are given to illustrate the effectiveness of the proposed methods.     

Second Order Estimates for Non-Concave Hessian Type Elliptic Equations on Riemannian Manifolds

In this paper, we derive second order estimates for a class of non-concave Hessian type elliptic equations on Riemannian manifolds. By applying a new method for $C^2$ estimates, we can weaken some conditions, which works for some non-concave equations. Gradient estimates are also obtained.     

Analytic approximate solutions to Burgers,Fisher, Huxley equations and two combined forms of these equations

In this paper, we are giving analytic approximate solutions to a class of nonlinear PDEs using the homotopy analysis method (HAM). The Burgers, Fisher, Huxley, Burgers–Fisher and Burgers–Huxley equations are considered. We aim two goals: one is to highlight the efficiency of HAM in solving this class of PDEs and the other is that, although the considered equations have different combinations of nonlinear terms, when applying HAM, we use the same initial guess, the same auxiliary linear operator and the same auxiliary function for all of them.     

Nontrivial solutions for discrete boundary value problems with multiple resonance via computations of the critical groups

In this paper, we study the existence of nontrivial solutions for a class of second-order difference equations with multiple resonance at both infinity and the origin by applying the critical point theory and Morse theory.     

一类差分方程的渐近性

本文对高维非自治差分方程x(τ+1)=f(τ,x)+g(τ,y);y(τ+1)=k(τ,x,y) (1)得到了保证其平凡解渐近稳定,一致渐近稳定的判别准则,而对V逐数的差分不要求负定性,推广了文[1]中相应的结果.     

Existence results and the moment estimate for nonlocal stochastic differential equations with time-varying delay

This paper considers a class of nonlocal stochastic differential equations with time-varying delay whose coefficients are dependent on the pth moment. By applying the fixed point theorem, the existence and uniqueness of the solution of nonlocal stochastic differential delay equations is studied. Also, a class of moment estimates of solutions is considered. The results are a generalization and continuation of the recent results on this issue. An example is provided to illustrate the effectiveness of our results.     

Hölder Estimates for A Class of Degenerate Elliptic Equations

In this paper we study the regularity theory of the solutions of a class of degenerate elliptic equations in divergence form. By introducing a proper distance and applying the compactness method we establish the Hölder type estimates for the weak solutions.     

Iterative algorithms for solving a class of complex conjugate and transpose matrix equations

This paper is concerned with iterative solutions to a class of complex matrix equations, which include some previously investigated matrix equations as special cases. By applying the hierarchical identification principle, an iterative algorithm is constructed to solve this class of matrix equations. A sufficient condition is presented to guarantee that the proposed algorithm is convergent for an arbitrary initial matrix with a real representation of a complex matrix as tools. By using some properties of the real representation, a convergence condition that is easier to compute is also given in terms of original coefficient matrices. A numerical example is employed to illustrate the effectiveness of the proposed methods.     

Approximate controllability of Hilfer fractional differential equations

In this paper, the approximate controllability for a class of Hilfer fractional differential equations (FDEs) of order 1<α<2 and type 0 ≤ β ≤ 1 is considered. The existence and uniqueness of mild solutions for these equations are established by applying the Banach contraction principle. Further, we obtain a set of sufficient conditions for the approximate controllability of these equations. Finally, an example is presented to illustrate the obtained results.