# 问题：

Suppose $A$ is a linear operator from vector space $V$ to vector space $W$, and $B$ is a linear operator from vector space $W$ to vector space $X$. Let $|v_{i}\rangle, |w_{i}\rangle$ , and $|x_{k}\rangle$ be bases for the vector spaces $V, W$, and $X$, respectively. Show that the matrix representation for the linear transformation $BA$ is the matrix product of the matrix representations for $B$ and$A$, with respect to the appropriate bases.

## 解答

#### 参考

[1]www.qtumist.com