Cesaro方法在球面曲线上的应用

Applications of Ces ro Method on Spherical Curve

本文用Cesàro不动条件证明了球面曲线的两个充要条件,(定理1.定理2)并对已有四个球面曲线的充要条件(推论1、2、3、4)给出简捷的证明。

This paper presents two necessary and sufficient conditions for spherical curv-es, from which the proofs of other four necessary and sufficient conditions for sp-herical curves ote much simplized.