解析函数唯一性定理的一个应用

在含有实轴或虚轴一段的区域D内解析的复函数u(x,y) iv(x,y)与u(z,0) iv(z,0)或u(0,-iz) iv(0,iz)存在恒等关系。据之可求以已知调和函数为实部或虚部的解析函数。     

有限偏差函数与调和函数

分别借助解析函数与调和函数两类函数的Dirichlet积分,利用相关文献给定边界值的拟共形映射极值伸缩商的估计方法,通过有限偏差函数和拟共形映射的关系估计了具有给定边界值的有限偏差函数的极值伸缩商.得到了解析函数的Dirichlet积分在有限偏差函数下具有拟不变性,同时给出有限偏差函数极值伸缩商的下界估计.     

解析函数模的下界问题

给出了在|z|＜R中含有零点的解析函数的模的一个下界;其推论推广了[4]的Thm．1,由此可较易地推出[5]中关于单位圆盘上解析函数的加权代数的可除性问题的结论．     

k-超正则函数及其相关函数的性质

给出了k -超正则函数的开拓定理和唯一性定理,由唯一性定理证明了超正则函数列的内闭一致收敛性; 由k -超正则函数的P 部和Q 部满足的两个微分方程,讨论了此方程与k -超正则函数及其相关函数的关系.     

解析函数方法的一个应用

设u(x,y)是D内的调和函数,f(z)是由u(x,y)生成的解析函数.通过求解f′(z)的零点,可以获得u(x,y)的稳定点.     

锥中调和函数的积分表示

本文证明了锥内一类调和函数h, 若其正部h⁺ = max{h,0} 满足一种增长条件, 则h 能被其边界值的积分表示. 同时证明了其负部h^- = max{-h,0} 也能被类似的一种增长条件所控制. 所得结论推广了解析函数和调和函数在上半空间中关于积分表示的相关结果.     

多值函数在复变函数中的应用

通过讨论初等多值函数的单值解析分枝问题,重点研究了初等多值函数在复变函数中的具体应用.     

辅助函数应用两例

看了贵刊85年第2期《辅助函数的几个应用》以后,本人深受启发,深感辅助函数在解题中确有广泛的应用。为了更好地帮助学生学好、掌握这一方法,现将辅助函数在求函数解析式中的应用补上,作为对《应用》一文的补充。     

K-解析函数的Riemann边值问题

引入了(分片)K-解析函数和Cauchy型K-积分的概念.利用K-对称变换的方法研究了Cauchy型K-积分的某些性质,然后借助函数在曲线上的指标与这些Cauchy型K-积分的性质,得到了K-解析函数类中的Riemann边值问题的可解条件和解的表达式以及它们与指标之间的关系.而解析函数和共轭解析函数都是K-解析函数的特例,文中所得结果,推广了解析函数和共轭解析函数中的相应结论.     

解析算子函数空间上的复合算子理论初步

本文将经典Hardy空间上复合算子的理论、方法应用到解析算子函数空间上,给出了解析算子函数空间的几个基本性质及复合算子的有界性条件.     

Multiple Cotangent and Generalized Eta Functions

In this paper we shall construct multiple analogue of the cotangent functions by using the multiple Hurwitz zeta functions and study their properties and special values. In particular, we express the double cotangent functions in terms of generalized eta functions of Berndt and Lewittes.     

On Small Values of Semi-Additive Functions

The purpose of this paper is to investigate small values of semi-additive functions and its application to find an upper bound of concentration functions for the sums of independent identically distributed random variables.     

与GA凸函数相关的函数的准线性

定义了两个与GA凸函数定积分有关的函数,证明了它们具有某种准线性.作为应用,讨论了这些函数的单调性.     

On the Gap Functions of Prevariational Inequalities

Gap functions play a crucial role in transforming a variational inequality problem into an optimization problem. Then, methods solving an optimization problem can be exploited for finding a solution of a variational inequality problem. It is known that the so-called prevariational inequality is closely related to some generalized convex functions, such as linear fractional functions. In this paper, gap functions for several kinds of prevariational inequalities are investigated. More specifically, prevariational inequalities, extended prevariational inequalities, and extended weak vector prevariational inequalities are considered. Furthermore, a class of gap functions for inequality constrained prevariational inequalities is investigated via a nonlinear Lagrangian.     

Semi-B-Preinvex Functions

In this note, a class of functions, called semi-B-preinvex function, which are a generalization of the semipreinvex functions and the B-vex functions, is introduced. Examples are given to show that there exist functions which are semi-B-preinvex functions, but are neither semipreinvex nor B-vex. A property of the semi-B-preinvex functions is obtained.Communicated by F. GiannessiThis research was partially supported by a Science Committee Project, Research Foundation of Chongqing, Grant 8409. The authors are thankful to the referees and Prof. F. Giannessi for suggestions and comments which helped to give the present form to this paper.     

Two-Dimensional Multiple-Valued Dirichlet Minimizing Functions

We give some remarks on two-dimensional multiple-valued Dirichlet minimizing functions, including frequency, classification of branch points and their connections. As an application, we prove that blowing-up functions of a two-dimensional multiple-valued Dirichlet minimizing function are unique. This article is concluded with a boundary regularity theorem for two-dimensional multiple-valued Dirichlet minimizing functions.     

关于二元分式线性齐次复合函数的积分

通过把二重积分转化成曲线积分,得到二元分式线性齐次复合函数积分的两个定理及其若干推论,并构造一些比较典型的用一般方法难以计算的例子说明结论的应用.     

半严格不变凸函数

文章在Banach空间中定义了一种新的广义凸函数—半严格不变凸函数.对于满足局部Lipschitz条件的半严格不变凸函数,得到了它的广义Clarke次微分性质.文中还讨论了半严格不变凸函数与不变凸函数及半严格预不变凸函数之间的关系,得到了半严格不变凸函数的一些性质.     

半严格不变凸函数

文章在Banach空间中定义了一种新的广义凸函数—半严格不变凸函数.对于满足局部Lipschitz条件的半严格不变凸函数,得到了它的广义Clarke次微分性质.文中还讨论了半严格不变凸函数与不变凸函数及半严格预不变凸函数之间的关系,得到了半严格不变凸函数的一些性质.     

Farkas-Type Theorems and Applications: From IPH Functions to ICR Functions

Abstract

Some versions of Farkas-type theorems for systems of inequalities consisting of Increasing and Positively Homogeneous (IPH) functions are established. Applying these results, we establish Farkas-type theorems for the systems involving Increasing and Coradiant (ICR) functions as well. As an application, we apply these results to solve constrained IPH and ICR optimization problems with unconstrained counterparts.