Volume 8, pp. 15-20, 1999.

On Geršgorin-type problems and ovals of Cassini

Richard S. Varga and Alan Krautstengl

Abstract

Recently, two Geršgorin-type matrix questions were raised. These are answered here, using ovals of Cassini.

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Key words

Geršgorin circle theorem, ovals of Cassini.

AMS subject classifications

15A18.

ETNA articles which cite this article

Vol. 12 (2001), pp. 113-133 Richard S. Varga: Geršgorin-type eigenvalue inclusion theorems and their sharpness

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