Sn The n-dimensional sphere, usually identified with those vectors in Rn+1 of length 1. Note S1, thought of as the unit circle in ℂ, is a subgroup of the multiplicative group of ℂ.
Sn
数学辞典收录了4151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。