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(詳細はeigenvectors and eigenvalues of a system that is perturbed from one with known eigenvectors and eigenvalues. This is useful for studying how sensitive the original system's eigenvectors and eigenvalues are to changes in the system. This type of analysis was popularized by Lord Rayleigh, in his investigation of harmonic vibrations of a string perturbed by small inhomogeneities. The derivations in this article are essentially self-contained and can be found in many texts on numerical linear algebra or numerical functional analysis. ==Example== Suppose we have solutions to the generalized eigenvalue problem, : where and are matrices. That is, we know the eigenvalues and eigenvectors for . Now suppose we want to change the matrices by a small amount. That is, we want to find the eigenvalues and eigenvectors of : where : with the perturbations and much smaller than and respectively. Then we expect the new eigenvalues and eigenvectors to be similar to the original, plus small perturbations: : 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Eigenvalue perturbation」の詳細全文を読む スポンサード リンク
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