Geršgorin theorems by Householder’s proof

Author: J. L. Brenner
Journal: Bull. Amer. Math. Soc. 74 (1968), 625-627
DOI: https://doi.org/10.1090/S0002-9904-1968-12039-7
Errata: Bull. Amer. Math. Soc., Volume 74, Number 4 (1968), 767--768
MathSciNet review: 0223074
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