Correction of error from previous lecture 0:43Introduction to the four fundamental subspaces(column space, null space, row space, left null space) 4:20Basis and dimension of each fundamental subspace 11:44Basis and dimension of the column space 12:50Dimension of the row space (it is the rank) 14:41Basis and dimension of the null space 17:05Dimension of the left null space (m - rank) 19:41Basis of the row space (nonzero rows in the rref) 21:08Basis of the left null space 29:48Review of the four fundamental subspaces 42:09A new vector space of all 3 by 3 matrices 42:32####[]