说明：  在网上找到的，很重要的一本关于矩阵计算的书，内容比较详细，写得非常清楚，这个文件是书的第一部分，第二部分很快上传。
(Found online, a very important book on the matrix calculation, a more detailed content, is very clear, this document is the first part of the book, From the second part soon.)