Geodesic
A short and elementary proof of Brauer's theorem
The Teaching of Mathematics, XXIV (2021) no. 2, p. 85

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

A short and elementary proof is given of a celebrated eigenvalue-perturbation result due to Alfred Brauer.
Classification : 97H60, 15A18, H65
Keywords: Brauer's theorem, eigenvalue, eigenvector, rank-one perturbation. 
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Judith J. McDonald; Pietro Paparella. A short and elementary proof of Brauer's theorem. The Teaching of Mathematics, XXIV (2021) no. 2, p. 85 . http://geodesic.mathdoc.fr/item/TM2_2021_XXIV_2_a2/