A 1937 theorem which classified planar regular closed curves up to regular Homotopy by their WindingNumbers. In his thesis, S. Smale generalized this result to regular closed curves on an-Manifold.
数学辞典收录了8975条数学词条,基本涵盖了常用数学知识及数学英语单词词组的翻译及用法,是数学学习的有利工具。