1. ## Eigenvalues

Dear Colleagues,

What do we mean a number $w$ is not an eigenvalue of an nxn matrix A?

Best Regards,

Raed.

2. Originally Posted by raed
What do we mean a number $w$ is not an eigenvalue of an nxn matrix A?

det ( A -w I ) =/= 0 or equivalently there is no v =/= 0 in IR^n such that A v = w v