Siegel’s axiom
In a mathematical text two mathematical symbols that do not form a larger of have to be by at least one word or by a punctuation mark.
Example: Do not write “… take -matrices”, but rather “take matrices of order ”.
数学辞典收录了18232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。