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Enclosure of the Numerical Range of a Class of Non-selfadjoint Rational Operator Functions [PDF]

Integral Equations and Operator Theory, 2017
In this paper we introduce an enclosure of the numerical range of a class of rational operator functions. In contrast to the numerical range the presented enclosure can be computed exactly in the infinite dimensional case as well as in the finite ...
Christian Engstrom, Axel Torshage
exaly   +2 more sources

The numerical range of banded biperiodic Toeplitz operators

Journal of Mathematical Analysis and Applications, 2013
Natalia Bebiano, J da Providência, A Nata   +2 more
exaly  

Numerical Range

2019
Mark Elin, Simeon Reich, David Shoikhet
openaire   +1 more source

Numerical range of a continuant matrix

Applied Mathematics Letters, 2001
Mao-Ting Chien
exaly  

On the numerical range of a matrix

Linear and Multilinear Algebra, 2008
Michiel E Hochstenbach
exaly  

Line segments and elliptic arcs on the boundary of a numerical range

Linear and Multilinear Algebra, 2008
Hwa-Long Gau, Pei Yuan Wu
exaly  

Convexity of the joint numerical range: topological and differential geometric viewpoints

Linear Algebra and Its Applications, 2004
Eugene Gutkin, E Jonckheere
exaly  

The Numerical Range is a $(1+\sqrt{2})$-Spectral Set

SIAM Journal on Matrix Analysis and Applications, 2017
exaly  

Theq-numerical range of matrix polynomials

Linear and Multilinear Algebra, 2000
Panayiotis J Psarrakos
exaly  

Mapping Theorems for the Numerical Range

American Journal of Mathematics, 1967
Berger, G. A., Stampfli, J. G.
openaire   +1 more source