One of the Eilenberg-Steenrod Axioms. Let be a single point space. unless , in which case where are some Groups. The are called the Coefficients of theHomology Theory .
数学辞典收录了8975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。