球面导数,高阶导数与正规族

本文应用陈怀惠和顾永兴关于Ｚａｌｃｍａｎ不正规性条件的改进结果，推广和加强了Ｌａｐｐａｎ的一个正规定则，Ｌａｐｐａｎ证明，若亚纯函数族中的所有函数的球面导数的害虫方（大于２）在紧集上的积发一致有界，则该族是有正则的，本文证明，把积分限制在函值数值模小于给常数的集上，结论仍然成立，同时，用高阶导数的积分替代球面导数的积分，得到十分一般的结果，另外对幂方为２的情形也进行了讨论。     

球上Bloch函数的导数与α－Carleson测度

设ｆ是Ｂ＝｛Ｚ∈Ｃｎ；｜ｚ｜＜１｝上的全纯函数，Ｒｍｆ是高阶径向导数，而Ｄｓｆ（ｓ＞０）是ｆ的ｓ阶分数次导数，本文证明ｆ是Ｂｌｏｃｈ函数当且仅当ｓｕｐ｛｜Ｒｍｆ（ｚ）｜（１－｜ｚ｜２ｍ｜＜＋∞或者　作为相关的结果，我们用Ｂｌｏｃｈ函数的积分性质刻划了α－Ｇａｒｌｅｓｏｎ测度，另一方面我们得到了Ｂｌｏｃｈ函数关于α－Ｃａｒｌｅｓｍ测度的新特征．     

复Fuzzy函数的Buckley导数与Buckley积分

本文对Ｊ．Ｊ．Ｂｕｃｋｌｅｙ在［１］、［２］中给出的实变量复Ｆｕｚｚｙ数值函数的导数与积分加以推广,引出复变量复Ｆｕｚｚｙ数值的导数与积分概念,为研究Ｆｕｚｚｙ复分析打下一定的基础。     

运用导数巧求数列和

导数是解决函数的变化率、单调性、极值、最值、不等式证明等问题的有力工具，高中教材中导数的引入为研究函数及其对应的曲线带来了极大方便．导数法在解题教学中的地位日益突出．数列是一种特殊的函数，本文介绍数列求和的一种方法——导数法。供大家参考．     

导数的应用举例

导数是研究函数的有力工具，它的应用十分广泛．中专现用数学教材中导数的应用主要限于求曲线的切线，讨论函数的单调性以及函数的极值等方面．事实上，某些恒等式的证明与函数性质的讨论，利用导数可以简便地解决．某些不等式证明与方程的讨论，可以转化为函数问题，然后...     

运用导数巧求数列和

导数是解决函数的变化率、单调性、极值、最值、不等式证明等问题的有力工具,高中教材导数的引入为研究函数及其对应的曲线带来了极大方便．导数法在解题教学中的地位日益突出．数列是一种特殊的函数,本文笔者通过例题介绍数列求和的一种新方法——运用导数法,供大家参考．     

如何利用导数证明不等式

利用导数证明不等式是近几年高考的重点和热点.由于导数是高等数学的基础知识,对中学生来说思维能力要求高、解题方法灵活、难度大等特点,于是成为每年高考题的压轴题.如何利用导数证明不等式是导数应用的一个重要问题,本文给出常见的几种证明方法.1.利用给定函数的单调性证明不等式利用函数本身的单调性来证明不等式,从形式上来说,可能是从形式上直接利用给出函数的性质,     

导数在证明积分等式中的应用

积分等式的证明，通常用定积分性质、换元积分法或分部积发法来完成。但由于导数与积分之间的密切联系，有时用导数来证明积分等式也十分方便。下面我们给出这种证明方法的几个例子。例1没人X）是以Z为周期的连续函数，证明这是大家熟知的定积分的一个基本性质，其证明通常利用定积分的性质和换元积分法来完成，下面我们利用导数来证明它。证将a看成是一个变量，设例2设八x）为连续函数，当然，此例用部分积分法也容易证明。由上面两例可以看出，欲证积分等式，可视其两端为某变量的函数等式，例如F（X）一G（X），若能证得P什）一O（x…     

亚纯函数的正规定则 献给余家荣教授100华诞

本文应用几何方法,深入研究亚纯函数的正规定则.首先定义并探讨球面上两点间的本性距离,在此基础上推广Montel正规定则和Marty正规定则,得到几个新的亚纯函数族正规的充要条件.本文还应用Ahlfors覆盖曲面理论,证明一些涉及区域的亚纯函数族的正规定则.     

导数运用新解读

导数是研究函数的单调性、极值、最值、值域以及函数图象的强有力工具．作为高中数学的新增内容之一，高考对导数的考查不会仅仅停留在这些单一的、传统的模式上．同时，作为与高等数学联系的纽带，导数的运用必将成为新教材高考试题的热点和命题的新增长点．本文拟从以下几个方面解读导数的新的应用．     

A NEW CHARACTERIZATION OF Qp^# FUNCTIONS

A new characterization of Q#p is given, which implies immediately a known result. Also, the authors consider a class Np of bounded characteristic with order p, 0 < p < ∞, in the unit disk and give some relationship between it and other classes of meromorphic functions. This paper answers partly a question mentioned by Aulaskari and Lappan.     

关于整函数超级的进一步结果

运用正规族理论研究了整函数与其高阶导数分担无穷级函数增长级与超级的相关结果.从亚纯函数超级大于零而使球面导数无界的角度出发,然后综合运用Pang-Zaclman引理,数学归纳法和Nevanlinna理论等方法证明了该结果,推广和改进了已有的结果.     

Normal functions and α-Normal Functions

This paper has studied two open questions about normal functions due to Lappan, and obtained two corresponding results for α-normal functions. Received April 5, 1999, Accepted June 9, 1999     

Spherical derivatives and normal families

We show that a family of functions meromorphic in a plane domain D whose spherical derivatives are uniformly bounded away from zero is normal. Furthermore, we show that for each f meromorphic in the unit disk D, inf _z∈D f ^#(z) ≤ 1/2, where f ^# denotes the spherical derivative of f.     

Bicomplex Analogue of Zalcman Lemma

In this paper a bicomplex analogue of Zalcman’s heuristic principle on normal families of meromorphic functions is obtained and as an application a bicomplex version of Lappan’s five-point theorem is proved.     

亚纯函数的正规族

关于正规族的Hayman猜测目前已完全证实,本文考虑把Hayman猜测中的 f′换为一般的f∧（k）,得到一个更为一般的结果,由此改进和推广了陈怀惠,顾永兴、华歆厚,庞学诚与W.Schwick的相应结果。     

超越整函数的某些动力学性质

本文研究了由m个超越整函数{fl,f2,…,fm}生成的随机迭代系统的Fatou集分支的某些动力学性质.运用复动力系统理论与双曲度量理论,得到了随机迭代系统有界Fatou分支不存在的一个判别准则,同时回答了Baker所提出的问题,且给出了随机迭代系统Fatou分支为单连通的一个充分条件,推广了Bergweiler的结果.     

Uncertainty principles for orthonormal sequences

The aim of this paper is to provide complementary quantitative extensions of two results of H.S. Shapiro on the time-frequency concentration of orthonormal sequences in L²(R). More precisely, Shapiro proved that if the elements of an orthonormal sequence and their Fourier transforms are all pointwise bounded by a fixed function in L²(R) then the sequence is finite. In a related result, Shapiro also proved that if the elements of an orthonormal sequence and their Fourier transforms have uniformly bounded means and dispersions then the sequence is finite. This paper gives quantitative bounds on the size of the finite orthonormal sequences in Shapiro's uncertainty principles. The bounds are obtained by using prolate spheroïdal wave functions and combinatorial estimates on the number of elements in a spherical code. Extensions for Riesz bases and different measures of time-frequency concentration are also given.     

Uniform LAN condition of planar Gibbsian point processes and optimality of maximum likelihood estimators of soft-core potential functions

Summary A parametric model of planar point patterns in a bounded region is constructed using grand canonical Gibbsian point processes with soft-core potential functions. A simple and explicit condition that this model becomes a uniform locally asymptotic normal (ULAN) family will be given. From this result we can conclude that the maximum likelihood estimator of the potential function is asymptotically efficient for a wide class of loss functions.     

A Friedrichs–Maz'ya inequality for functions of bounded variation

The aim of this short note is to give an alternative proof, which applies to functions of bounded variation in arbitrary domains, of an inequality by Maz'ya that improves Friedrichs inequality. A remarkable feature of such a proof is that it is rather elementary, if the basic background in the theory of functions of bounded variation is assumed. Nevertheless, it allows to extend all the previously known versions of this fundamental inequality to a completely general version. In fact the inequality presented here is optimal in several respects. As already observed in previous proofs, the crucial step is to provide conditions under which a function of bounded variation on a bounded open set, extended to zero outside, has bounded variation on the whole space. We push such conditions to their limits. In fact, we give a sufficient and necessary condition if the open set has a boundary with σ‐finite surface measure and a sufficient condition if the open set is fully arbitrary. Via a counterexample we show that such a general sufficient condition is sharp.