identity As opposed to an equation, an identity holds true for a range of values, such as x2−y2 = (x + y)(x−y) for real x and y. Sometimes the symbol ≡ is used instead of = to indicate that a statement is an identity.
identity
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。