柯西中值定理的逆问题及渐进性

讨论了柯西中值定理的逆问题,并将柯西中值定理"中间点"的渐进性在高阶柯西中值定理中作了推广,得到了一般性的结论.     

Gevrey空间中抽象柯西-柯瓦列夫斯卡娅定理:能量方法

本文研究了非线性柯西问题的适定性问题.利用经典的能量法和抽象柯西-柯瓦列夫斯卡娅定理,得到非线性柯西问题在Gevrey空间中是适定的.推广了已有文献在非线性柯西问题适定性方面的研究.     

从历史的角度引入柯西-黎曼方程

通过对欧拉和黎曼两人获得柯西-黎曼方程的历史过程进行比较。可以发现，欧拉所采取的途径对复分析的引导更加自然．     

围线积分的计算及巧妙运用

围线积分的计算在复变函数与积分变换中被广泛使用,对后继课程的学习非常重要.本文将积分计算中需注意的问题和计算方法详加总结,并应用柯西积分定理解决一些复杂问题.     

学习柯西积分定理及留数定理的体会

本文利用在闭区域上解析的函数其导数必连续这一结论,证明柯西积分定理、闭路变形原理及复合闭路定理.总结复变函数的留数定理与物理上电通量的高斯定理的相似性.     

罗尔定理证明一类存在性问题

提出罗尔定理证明一类存在性问题的方法,采用拉格朗日中值定理或柯西中值定理来证明这类问题往往需要构造精巧的辅助函数,我们还指出了这种方法的一般性.     

广义柯西中值定理的“中间点”的渐近性

广义柯西中值定理的“中间点”的渐近性殷子和，马龙友（武汉工业大学北京研究生部）（北京建筑工程学院）文［１］、［２］对柯西中值定理的“中间点ξ”的渐近性问题进行了研究．本文给出广义柯西中值定理的“中间点ξ”的渐近性定理，并予以证明．柯西中值定理的一种推...     

参数方程所确定函数求导的一点注记

针对参数方程所确定函数的求导问题,从导数定义和柯西中值定理两个不同的角度,给出了比通用的微积分和数学分析教材更一般的结论,并对结论进行了推广和应用.     

弱条件多函数对称式柯西中值定理

本文利用行列式作工具,给出了多函数对称式柯西中值定理,减弱了柯西中值定理的条件.     

一道涉及泰勒公式的典型例题及其应用

应用泰勒公式,达布定理,洛尔定理,柯西中值定理,对一道典型的例题提供了三种解答,此外,选取若干个例子作为这道典型例题的应用.     

一个广义的Cauchy型的Taylor公式

给出了一个高阶导数形式的、广义的C auchy型的T ay lor公式,它将数学分析中一阶微分形式的C auchy中值定理推广到高阶导数形式,同时它也是T ay lor中值定理的推广.     

Exceptions and counterexamples: Understanding Abel's comment on Cauchy's Theorem

It may seem odd that Abel, a protagonist of Cauchy's new rigor, spoke of “exceptions” when he criticized Cauchy's theorem on the continuity of sums of continuous functions. However, when interpreted contextually, exceptions appear as both valid and viable entities in the early 19th century. First, Abel's use of the term “exception” and the role of the exception in his binomial paper is documented and analyzed. Second, it is suggested how Abel may have acquainted himself with the exception and his use of it in a process denoted critical revision is discussed. Finally, an interpretation of Abel's exception is given that identifies it as a representative example of a more general transition in the understanding of mathematical objects that took place during the period. With this interpretation, exceptions find their place in a fundamental transition during the early 19th century from a formal approach to analysis toward a more conceptual one.     

Bolzano's Theorems for Holomorphic Mappings

The existence of a zero for a holomorphic functions on a ball or on a rectangle under some sign conditions on the boundary generalizing Bolzano's ones for real functions on an interval is deduced in a very simple way from Cauchy's theorem for holomorphic functions.A more complicated proof,using Cauchy's argument principle,provides uniqueness of the zero,when the sign conditions on the boundary are strict.Applications are given to corresponding Brouwer fixed point theorems for holomorphic functions.Extensions to holomorphic mappings from Cn to Cn are obtained using Brouwer degree.     

数学分析中若干具有共性理论的问题

探讨数学分析中若干具有共性理论的问题,并重点阐述数学分析中若干关于一致问题与Cauchy定理的教学探索和实践.     

Cauchy中值定理的推广及应用

讨论了Cauchy中值定理中分子分母上的导函数可以同时取零值的情况,获得了Cauchy中值定理的一种推广,改进了[1]和[2]中的结果.     

Banach空间中Cauchy初值问题解的存在性

在研灾Banach空间常微分方程Cauchy 问题解的存在性问题时,人们常常使用一个 很难验证且一般情况下难以达到的条件──一致连续性条件,本文完全不使用一致连续性条 件,仅利用紧型条件,获得了Banach空间Cauchy问题解的存在性定理,从而改进和推广了已 知的有关结果,     

一个Grüs型积分不等式的单参数推广

利用Cauchy中值定理给出Pachpatte B G建立的一个Grüss型积分不等式的单参数推广.     

Application of Wiener-Hopf technique to linear nonhomogeneous integral equations for a new representation of Chandrasekhar's H-function in radiative transfer, its existence and uniqueness

In this paper, the linear nonhomogeneous integral equation of H-functions is considered to find a new form of H-function as its solution. The Wiener-Hopf technique is used to express a known function into two functions with different zones of analyticity. The linear nonhomogeneous integral equation is thereafter expressed into two different sets of functions having the different zones of regularity. The modified form of Liouville's theorem is thereafter used, Cauchy's integral formulae are used to determine functional representation over the cut region in a complex plane. The new form of H-function is derived both for conservative and nonconservative cases. The existence of solution of linear nonhomogeneous integral equations and its uniqueness are shown. For numerical calculation of this new H-function, a set of useful formulae are derived both for conservative and nonconservative cases.     

The Sampling Theorem and Several Equivalent Results in Analysis

First we show that several fundamental results on functions from theBernstein spaces (such as Bernstein's inequality andthe reproducing formula) can be deduced from a weak form of the classicalsampling theorem. In §3 we discuss the mutual equivalence of thesampling theorem, the derivative sampling theorem and a harmonic functionsampling theorem. In §§4–6 we discuss connections between thesampling theorem and various important results in complex analysis andFourier analysis. Our considerations include Cauchy's integral formula,Poisson's summation formula, a Gaussian integral, certain properties ofweighted Hermite polynomials, Plancherel's theorem, the maximum modulusprinciple, and the Phragmén–Lindelöf principle.