2021年10月9日
矩阵论 - 6 - 列空间、零空间
摘要： The column space of a matrix A tells us when the equation Ax = b will have a solution x. The null space of A tells us which values of x solve the equation Ax = 0. 阅读全文
posted @ 2021-10-09 23:08 zju_cxl 阅读(761) 评论(0) 推荐(0)
矩阵论 - 5 - 转置、置换、向量空间
摘要： To account for row exchanges in Gaussian elimination, we include a permutation matrix P in the factorization PA = LU. Then we learn about vector spaces and subspaces; these are central to linear algebra. 阅读全文
posted @ 2021-10-09 21:41 zju_cxl 阅读(788) 评论(0) 推荐(0)