Approximation of the Quadratic Numerical Range of Block Operator Matrices

被引：0
|
作者：
Ahmed Muhammad
Marco Marletta
机构：
[1] Wales Institute of Mathematical and Computational Sciences,Cardiff School of Mathematics
来源：
Integral Equations and Operator Theory | 2012年 / 74卷
关键词：
Primary 47A10; 47A12; 47A75; Secondary 15A60; block operator matrix; quadratic numerical range; projection method; Hain–Lüst operator; spectral pollution;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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–Lüst operators are given.
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页码：151 / 162
页数：11
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