The Gerschgorin discs under unitary similarity

Zalewska-Mitura, Anna ; Zemánek, Jaroslav

Banach Center Publications, Tome 38 (1997), p. 427-441 / Harvested from The Polish Digital Mathematics Library

Résumé

The intersection of the Gerschgorin regions over the unitary similarity orbit of a given matrix is studied. It reduces to the spectrum in some cases: for instance, if the matrix satisfies a quadratic equation, and also for matrices having "large" singular values or diagonal entries. This leads to a number of open questions.

Détail

Publié le : 1997-01-01

Zbl 0877.15020

EUDML-ID : urn:eudml:doc:208645

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