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这个系列文章是我重温Gilbert老爷子的线性代数在线课程的学习笔记。
Course Name:MIT 18.06 Linear Algebra
Text Book: Introduction to Linear Algebra
章节内容: 3.6


课程提纲
1. Four fundamental subspaces for matrix A A

课程重点

Four fundamental subspaces for matrix A

The rank of a matrix is the number of pivots. The dimension of a subspace is the number of vectors in a basis.

The main point is that the four dimensions are the same for A A and R.
The dimension of the row space is the rank r r . The nonzero rows of R form a basis.
The dimension of the column space is the rank r r . The pivot columns form a basis.
The nullspace has dimension nr. The special solutions form a basis.
The nullspace of RT R T (left nullspace of R R ) has dimension mr.

The big picture

本文标签: 学习笔记Lecturesubspacesfundamental