tautology A compound statement that is true for all possible truth values of its components. For example, p ⇒ (q ⇒ p) is a tautology, as can be seen by calculating its truth table.
tautology
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。