-when AC = I or BA = I.
-Let A be an nxn matrix then A is invertible if there is another nxn matrix A^-1 such that AA^-1 = Identity and A^-1A = Identity
-A has a pivot in every row and column
-reduced echelon form of A is Identity
-linear dependence = not invertible.
Math 4A Midterm 2
Vocabulary for Math 4A Midterm 2. Find, create, and access Linear Algebra, Vector Space, linear transformation, Ker, flashcards with Course Hero.