in homological algebra, a structure consisting of a sequence of modules and a sequence of homomorphisms between consecutive modules such that the image of each homomorphism is included in the kernel of the next
In the Vinony graph
Vinony's link graph records 180 inbound references to 链复形, and connects out to mathematics, International Standard Book Number and natural number.
It is catalogued under topics including Differential topology and Homological algebra.
Vinony links it to 19 Wikipedia language editions.
Wikidata facts
- Subclass of
- diagram
- Image
- Chain map.svg
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- maintained by WikiProject
- WikiProject Mathematics
- Commons category
- Complexes (algebra)
- discoverer or inventor
- Walther Mayer
- used by
- homology
- studied by
- homological algebra
Sources (1)
via Wikidata · CC0
Article · 中文
数学上,同调代数领域中的一个链复形是一个交换群或者模的序列A0, A1, A2... 通过一系列同态dn : An→An-1相连,使得每两个连接的映射的复合为零:dn o dn+1 = 0对于所有n。它们常常写作如下形式: 定義鏈複形的同調群為 。當所有同調群為零時,此鏈複形為正合的。 链复形概念的一个变种是上链复形。一个上链复形是一个交换群或者模的序列A0, A1, A2...由一系列同态dn : An→An+1相连,使得任何两个接连的映射的复合为零:dn+1 o dn = 0 对于所有的n: 定義上鏈複形的上同調群為 。當所有上同調群為零時,此上鏈複形正合。想法基本上是一样的。 链复形的应用通常定义并应用它们的同调群(对于上链复形是上同调群);在更抽象的范围里,很多等价关系被应用到复形上(例如从链同伦的思想开始,以下将解说)。链复形很容易在交换范畴中定义。 一个有界复形是其中,几乎所有的Ai为零—这样一个有限的复形,用0来伸展到左边和右边。一个例子是定义一个(有限)单纯复形的的复形。
Abstract from DBpedia / Wikipedia · CC BY-SA