# Math Help - Eigenvalue proof

1. ## Eigenvalue proof

Let A and B be n*n matrices. Show that AB and BA have the same eigenvalues.
(Hint: Consider separately the two cases (i) B is invertible, and
(ii) B is not invertible.

2. Originally Posted by ulysses123
Let A and B be n*n matrices. Show that AB and BA have the same eigenvalues.
(Hint: Consider separately the two cases (i) B is invertible, and
(ii) B is not invertible.
http://www.mathhelpforum.com/math-he...tml#post513354