The Eigenproblem and Invariant Subspaces: Perturbation Theory
In this collection of papers, Pete Stewart established the foundations for the perturbation theory of invariant subspaces. He introduced two crucial concepts that allow a systematic approach toward such a perturbation theory: subspace rotation and operator separation. These two concepts form the guiding principle in most of these papers.
KeywordsInvariant Subspace Diagonal Block Operator Separation Hermitian Matrice Rayleigh Quotient
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