Approximation of the Quadratic Numerical Range of Block Operator Matrices |
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| Authors: | Ahmed Muhammad Marco Marletta |
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| Affiliation: | 1. Cardiff School of Mathematics, Wales Institute of Mathematical and Computational Sciences, 21-23 Senghennydd Road, Cardiff, CF24 4AG, UK
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| Abstract: | ![]()
In this paper we establish an approximation of the quadratic numerical range of bounded and unbounded block operator matrices by variational methods. Applications to Hain?CLüst operators are given. |
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