[Math] approximate matrix diagonalization algorithm

matricesna.numerical-analysis

hello.

I am looking for an approximate diagonalization method.
I need method which can generate orthogonal transformation to reduce off diagonal elements, but not necessarily make them zero. my option right now is Jacoby, but then looking for other options.

If you know of one, can you direct me to article/resource?
thank you

Best Answer

You might consider iterative and black-box methods, and particularly Arnoldi.