freeCodeCamp/guide/chinese/mathematics/linear-algebra/spans/index.md

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---
title: Spans
localeTitle: 跨度
---
## 跨度
##### 介绍
设S是向量空间V的非空子集.S的跨度由spanS表示是包含S中向量的所有线性组合的集合。为方便起见我们定义span= {0} 。
要么
设S是向量空间W中的一组向量.S跨越的子空间定义为包含S的V的所有子空间的交点W.当S是有限的向量集时S = {α1α2... αn}我们简单地将W称为由向量α1α2...αn跨越的子空间。
#### 更多信息: