Geodesic
The numerical range of linear operators on the 2-dimensional Kreĭn space
The electronic journal of linear algebra, Tome 22 (2011), pp. 430-442.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: The aim of this note is to provide the complete characterization of the numerical range of linear operators on the 2-dimensional Krein space C 2 .
Classification : 46C20, 47A12
Keywords: Kreĭn space, numerical range, rank one operator 
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Nakazato, Hiroshi; Bebiano, Natalia; Da Providencia, Joao. The numerical range of linear operators on the 2-dimensional Kreĭn space. The electronic journal of linear algebra, Tome 22 (2011), pp. 430-442. http://geodesic.mathdoc.fr/item/ELA_2011__22__a52/