I had a question regarding the relationship between multiplicity of eigenvalue and eigenvectors.
I am more interested in eigenvalue's multiplicity than the value itself. Because if eigenvalue has multiplicity, the number of independent eigenvectors ``could'' decrease. My favorite property of eigen-analysis is that is a transformation to simpler basis. Here, simpler means a matrix became a scalar. I even have a problem to understand a 2x2 matrix, but a scalar has no problem, or there is no simpler thing than a scalar. Ax = λ x means the matrix A equals λ, what a great simplification!
My question is
If λ has multiplicity, are there still independent eigenvectors for the eigenvalue?My intuition said no. I can compute an eigenvector to a corresponding eigenvalue. But, I think I cannot compute the independent eigenvectors for one eigenvalue.
For instance, assume 2x2 matrix that has λ = 1,1, how many eigenvectors? one?
Recently I found this is related with diagonalization using eigenvector. My intuition was wrong.
For one eigenvalue, that has multiplicity, there can be multiple eigenvectors.
I will show the example of this one eigenvalue and multiple eigenventors in next article.