Abstract Let A be an n × n Hermitian matrix and A = UΛUH be its spectral decomposition, where U is a unitary matrix of order n and Λ is a diagonal matrix. In this note we present the perturbation ...
https://doi.org/10.4169/amer.math.monthly.120.08.741 • https://www.jstor.org/stable/10.4169/amer.math.monthly.120.08.741 Copy URL Abstract The existence of an ...
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