Chinese 自由阿贝尔群 Cited by user 書畫晝盡 on 01 Sep 2023 数学中,自由阿贝尔群是有基的阿贝尔群. 阿贝尔群是配备了符合结合律、交换律且有逆的运算的集合. 基,对于群中每个元素,可以唯一表示为有限多基元素的整数组合,那么这些基元素就构成了基,也称作整基,是集合的子集.
English Non-Hausdorff manifold Cited by user PatrickR2 on 24 Aug 2023 In geometry and topology, it is a usual axiom of a manifold to be a Hausdorff space.
English Exhaustion by compact subsets Cited by user PatrickR2 on 05 Nov 2022 In mathematics, especially general topology and analysis, an exhaustion by compact sets of a topological space, but then the property becomes the same as the space being σ…
Korean Graduate Texts in Mathematics Cited by user Cwlo2F on 09 May 2022 Graduate Texts in Mathematics (GTM)는 슈프링어에서 출판한 대학원 수준의 수학 교과서 시리즈이다.