摘要
本文采用了路径为参数方程的时候、证明了曲线积分与路径无关，文中证法仅用到线积分本身，而勿需借助其它定理．
In this paper,the independence of path of line integrals is proved when the path is given parametrically.The proof involves no any other theorems.but the basic concept for line integrals.
关键词
凸区域
曲线弧族
参数方程
曲线积分
积分路径
onvex region arc family of curve continuously differentiable parametric equation
