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Banach Space Complexes

  • Cǎlin-Grigore Ambrozie
  • Florian-Horia Vasilescu

Part of the Mathematics and Its Applications book series (MAIA, volume 334)

Table of contents

  1. Front Matter
    Pages i-v
  2. Cǎlin-Grigore Ambrozie, Florian-Horia Vasilescu
    Pages 1-2
  3. Cǎlin-Grigore Ambrozie, Florian-Horia Vasilescu
    Pages 3-68
  4. Cǎlin-Grigore Ambrozie, Florian-Horia Vasilescu
    Pages 69-152
  5. Cǎlin-Grigore Ambrozie, Florian-Horia Vasilescu
    Pages 153-196
  6. Back Matter
    Pages 197-213

About this book

Introduction

The aim of this work is to initiate a systematic study of those properties of Banach space complexes that are stable under certain perturbations. A Banach space complex is essentially an object of the form 1 op-l oP +1 ... --+ XP- --+ XP --+ XP --+ ... , where p runs a finite or infiniteinterval ofintegers, XP are Banach spaces, and oP : Xp ..... Xp+1 are continuous linear operators such that OPOp-1 = 0 for all indices p. In particular, every continuous linear operator S : X ..... Y, where X, Yare Banach spaces, may be regarded as a complex: O ..... X ~ Y ..... O. The already existing Fredholm theory for linear operators suggested the possibility to extend its concepts and methods to the study of Banach space complexes. The basic stability properties valid for (semi-) Fredholm operators have their counterparts in the more general context of Banach space complexes. We have in mind especially the stability of the index (i.e., the extended Euler characteristic) under small or compact perturbations, but other related stability results can also be successfully extended. Banach (or Hilbert) space complexes have penetrated the functional analysis from at least two apparently disjoint directions. A first direction is related to the multivariable spectral theory in the sense of J. L.

Keywords

Banach space Operator theory functional analysis integral transform operational calculus partial differential equation

Editors and affiliations

  • Cǎlin-Grigore Ambrozie
    • 1
  • Florian-Horia Vasilescu
    • 2
  1. 1.Institute of MathematicsRomanian Academy of SciencesBucharestRomania
  2. 2.U.F.R. de MathématiquesUniversité de Lille 1Villeneuve d’AscqFrance

Bibliographic information