A Hilbert‐space variant of Geršgorin's circle theorem

Marcus Carlsson and Olof Rubin

Mathematische Nachrichten, 2024, vol. 297, issue 8, 3095-3106

Abstract: We provide a variant of Geršgorin's circle theorem, where the ℓ1$\ell ^1$‐estimates are swapped for ℓ2$\ell ^2$‐estimates, more suitable for the infinite‐dimensional Hilbert space setting.

Date: 2024
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https://doi.org/10.1002/mana.202300153

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