摘 要:本文首先介绍了经典儒歇定理和它的其中一个典型简单应用.其次通过对经典儒歇定理的应用例子中的条件进行分析,认识到经典儒歇定理条件的苛刻性和应用的局限性.因而为了增强儒歇定理的应用性,适当减弱或改变该定理的某些条件,于是儒歇定理的部分推广定理被推得并作出了总结,同时也给出了它们的证明.接着在一些实变函数在一定区域内根的分布情况的研究中,通过对儒歇定理与数学分析中的根的存在定理在此应用上作比较,揭示出了经典儒歇定理在该应用上的优越性.最后着重介绍并归纳了儒歇定理以及部分推广定理在三个研究领域中的应用.38307 毕业论文关键词:辐角原理;儒歇定理;解析函数;零点个数
Rouche Theorem and The Application of Rouche Theorem
Abstract: In this paper, firstly, it shows readers classical Rouche theorem and simple application of this theorem. Secondly, by means of analysing the conditions among the simple application of the classical Rouche theorem, we realize the punitive of conditions above classical Rouche theorem and the limitations of application. thus, in order to enhance the applicability of Rouche theorem, we weaken or change the conditions of this theorem properly. So, parts of the generalizations of Rouche theorem are summarized and proof of them is given. Then, researching the distribution of the root about functions of real variable in some areas, compared with the root of the existence theorem in mathematical analysis, the superiority of Rouche theorem is promulgated. Finally, we discuss emphatically the application of Rouche theorem and parts of the generalizations of Rouche theorem in three investigative aspects.
Key words: Argument principle; Rouche theorem; Analytic function; Number of zeros
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