sign A symbol denoting an operation, such as+, −, × and ÷ in arithmetic or ∘ to denote composition of functions, etc. The positive or negative nature of a quantity is called its sign.
sign
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。