5楼: Originally posted by junefi at 2018-04-27 10:02:37
{S_\bot } is referred to as the orthogonal complement. Orthogonal complement
{A_\bot } is also referred to as the orthogonal complement (of a matrix) such that {A_\bot }^T A = 0 or {A_\bot } A^T= 0....

2楼: Originally posted by junefi at 2018-04-26 18:52:57
一般是linear subspace写在上面，表示这个空间的orthogonal complement. 矩阵写在右下角，表示和原矩阵组成的

3楼: Originally posted by junefi at 2018-04-26 18:55:02
矩阵写在右下角，表示构造的矩阵的列(行)与原矩阵的列(行)正交....