Compute the Eigenvalues and Eigenvectors


by swtjuice
Tags: algebra, eigenvalue, eigenvector, linear
swtjuice
swtjuice is offline
#1
Sep20-11, 04:26 PM
P: 3
1. The problem statement, all variables and given/known data

Compute the Eigenvalues and Eigenvectors of A
A= [0 0 1;0 2 0;3 0 0]


2. Relevant equations

|A-lamda*I|=0
where I know the lamdas and plug them into the above equation and expand the system of equations.

3. The attempt at a solution

I have solved for the eigenvalues and got +sqrt(3), -sqrt(3) and 2.
I have solved for the eigenvectors associated with +sqrt(3), -sqrt(3), and checked them in matlab.
For lamda (eigenvalue) of sqrt(3) the eigenvector is
[ 1;0;sqrt(3)]

For lamda (eigenvalue) of -sqrt(3) the eigenvector is
[ -1;0;sqrt(3)]

But for when the eigenvalue is equal to 2 I come up to problems. where the 2nd row of my matrix is all zeroes. This confuses me because I have checked the vector in matlab and know it should be [0;1;0]. Which is impossible based on the 2nd row being all zeroes.
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