北京师范大学学报（自然科学版）2001，Vol.37Issue(2)：153-156,4.
关于简单闭曲线切线的旋转指标定理
ON THE THEOREM OF TURNING TANGENTS OF SIMPLE CLOSED CURVES
摘要
Abstract
Using an intuitionistic and primary method, a proof of the theorem of turning tangents of plane simple closed curves is given. The method is applicable to study the similar geometric objects in general cases.关键词
闭曲线/旋转指标/简单分类
数理科学引用本文复制引用
王幼宁,王雨生,刘继志..关于简单闭曲线切线的旋转指标定理[J].北京师范大学学报（自然科学版）,2001,37(2):153-156,4.
