瑕积分敛散性的判别方法和应用

摘要

本文给出瑕积分收敛性的判断方法，并将其运用到瑕积分的解题之中．判断瑕积分收敛的方法主要有定义法、比较法和柯西判别法、狄利克雷判别法和阿贝尔判别法，被积函数的原函数已知或易求的用定义法；满足狄利克雷判别法条件的函数用狄利克雷判别法；满足阿贝尔判别法条件的函数用阿贝尔判别法；含有正弦、余弦等有界函数或绝对收敛的函数可考虑用比较法来判断.依据两类含参量反常积分可以互化的关系，从含参量无穷限积分的一致收敛的判定定理出发，给出了含参量瑕积分一致收敛性的判定定理及其证明．最后给出了瑕积分计算可简化的两种形式,以便能够更方便更准确的计算出瑕积分的值.

关键词：瑕积分；收敛；含参量瑕积分；含参量无穷限积分；一致收敛

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Abstract

In this paper, we give the flaw integral convergence judgment method, and apply to solving of flaw integral. Judging method of flaw integral convergence are mainly definition method, comparative method and cauchy-criterion principle. Definition method can be used when integrand is easly obtained. Dirichlet test and Abel's test are carried out when some conditions are satisfied. Compar合成氨反应ative method can be used when sine or cosine function and so on, 歌从心底唱起bounded function is included.

By means of the relation between the two abnormality integral containing parameters, the judgment theorem of consistent astringency of flaw integral containing parameters is deduced from the judgment theorem of consistent astringency infinite integral containing parameters. Some typical examples are given to illuminate the application of the obtained

judgment and theorem. This paper presents some conditions under which defect integral can be computed as common intergral.We prove that defect integral canbe computed as common intergral if the original function of the integrand is continuous of bounded on the integeral interval.

Key words: Flaw integral; C饮用水水质标准onvergence; Flaw integral containing parameters; Infinite integral containing parameters; Consistent astringency

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