Spectral inclusion by the quadratic numerical range of 2 x 2 operator matrices with unbounded entries

DOI10.2298/FIL2004283LzbMath1498.47008OpenAlexW3121115857MaRDI QIDQ5864818

Alatancang Chen, Jie Liu, Jun-Jie Huang

Publication date: 10 June 2022

Published in: Filomat (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.2298/fil2004283l

zbMATH Keywords

quadratic numerical rangeoperator matrixspectral inclusion

Mathematics Subject Classification ID

Numerical range, numerical radius (47A12) Operator matrices (47A08)

Cites Work

• Spectral inclusion properties of the numerical range in a space with an indefinite metric
• Structure of the spectrum of infinite dimensional Hamiltonian operators
• Spectral inclusion for unbounded block operator matrices
• Perturbation theory for linear operators.
• Spectral inclusion properties of unbounded Hamiltonian operators
• Perturbation of closed operators and their adjoints
• A new concept for block operator matrices: The quadratic numerical range
• Unnamed Item
• Unnamed Item
• Unnamed Item

This page was built for publication: Spectral inclusion by the quadratic numerical range of 2 x 2 operator matrices with unbounded entries