# Limit Operators, Collective Compactness, and the Spectral Theory of Infinite Matrices

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*Simon N. Chandler-Wilde; Marko Lindner*

In the first half of this memoir the authors explore the interrelationships between the abstract theory of limit operators (see e.g. the recent monographs of Rabinovich, Roch and Silbermann (2004) and Lindner (2006)) and the concepts and results of the generalised collectively compact operator theory introduced by Chandler-Wilde and Zhang (2002). They build up to results obtained by applying this generalised collectively compact operator theory to the set of limit operators of an operator \(A\) (its operator spectrum). In the second half of this memoir the authors study bounded linear operators on the generalised sequence space \(\ell^p(\mathbb{Z}^N,U)\), where \(p\in [1,\infty]\) and \(U\) is some complex Banach space. They make what seems to be a more complete study than hitherto of the connections between Fredholmness, invertibility, invertibility at infinity, and invertibility or injectivity of the set of limit operators, with some emphasis on the case when the operator \(A\) is a locally compact perturbation of the identity. Especially, they obtain stronger results than previously known for the subtle limiting cases of \(p=1\) and \(\infty\).

#### Table of Contents

# Table of Contents

## Limit Operators, Collective Compactness, and the Spectral Theory of Infinite Matrices

- Chapter 1. Introduction 110 free
- Chapter 2. The Strict Topology 2130
- Chapter 3. Classes of Operators 2938
- Chapter 4. Notions of Operator Convergence 4150
- Chapter 5. Key Concepts and Results 4756
- Chapter 6. Operators on p(ZN,U) 5968
- Chapter 7. Discrete Schrödinger Operators 8998
- Chapter 8. A Class of Integral Operators 97106
- Chapter 9. Some Open Problems 101110
- Bibliography 103112
- Index 109118 free