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/