fourth root of unity A complex number z such that z4 = 1. There are 4 fourth roots of unity and they are 1, i, −1 and −i. (See nth root of unity.)
fourth root of unity
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。