Exercise:
Let’s find the eigenvalue and eigenvector of this vector
(1)
Solution:
Step 1: Characteristic Polynomial
For the definition of eigenvalue and eigenvector, we got eigenvector to satisfy
, which can be rewritten as
.
Because ,
is invertible. Its determinant is thus 0,
.
Step 2: Eigenvalue
(2)
Step 3: Eigenvector and eigenspace