摘要：
Computing the nullspace (Ax=0) Pivot variables-free variables Special solutions: rref( A)=R rank of A=the number of pivots=2 由上述矩阵行变换回代可得方程 我们自行给free 阅读全文
摘要：
Vector spaces and subspaces Column space of A solving Ax=b Null space of A Vector space requirements v+w and cv are in the space All combs cv+dw are i 阅读全文