Operators with a given part of the numerical range

In: Mathematica Slovaca, vol. 66, no. 1

Janko Bračič - Cristina Diogo

Detaily:

Rok, strany: 2016, 275 - 280

Kľúčové slová:

numerical range, Hildebrandt's theorem

DOI: https://doi.org/10.1515/ms-2015-0134

O článku:

Sets of operators which have a given set of numbers in the numerical range are studied. We prove an interesting result which characterizes the set of operators that have $0$ in the convex hull of its spectrum. Along the way we give a simpler proof of the well known Hilbebrandt's theorem.

Ako citovať:

ISO 690:

Bračič, J., Diogo, C. 2016. Operators with a given part of the numerical range. In Mathematica Slovaca, vol. 66, no.1, pp. 275-280. 0139-9918. DOI: https://doi.org/10.1515/ms-2015-0134

APA:

Bračič, J., Diogo, C. (2016). Operators with a given part of the numerical range. Mathematica Slovaca, 66(1), 275-280. 0139-9918. DOI: https://doi.org/10.1515/ms-2015-0134

O vydaní:

Publikované: 1. 2. 2016