Riemann引理的若干证法和推广

The Proving and Popularizing of Riemann Lemma

本文首先给出了Ｒｉｅｍａｎｎ引理及其三种证法；然后通过直接方法、变量替换方法和多项式逼近的方法分别进行了证明．最后给出了Ｒｉｅｍａｎｎ引理的推广及其证明。

In this paper, we first give the Riemann lemma, then gives the proving pass through the first-hand method, the-variables replacement method and the polynmial approximation method, the last give the popularizing and the proving of Riemann leman.