Talk:Arnoldi iteration

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"Typically, the Ritz eigenvalues converge to the extreme eigenvalues of A".

What does "extreme" eigenvalues mean?

When A is symmetric (-> Lanczos ), the answer is obvious as eigenvalues are real, and they can be ordered. What about the unsymmetric case, where eigenvalues are complex?

Largest/smallest absolute value, real part, imaginary part?

Well, I have no answer to this (yet).