公式markdown还不会用，直接传图了，源文件在图下面
源文件：
https://github.com/MaHaLo-G/Storage_Public/blob/master/PCA与SVD.docx
参考目录：
《矩阵分析与应用(第二版)》
see.stanford.edu/materials/aimlcs229/cs229-notes10.pdf
blog.csdn.net/u013719780/article/details/78352262
www.mathworks.com/content/dam/mathworks/mathworks-dot-com/moler/eigs.pdf 10.5节
www.zhihu.com/question/49959130
www.zhihu.com/question/19666954
www.zhihu.com/question/22237507/answer/53804902
