Banach Space Complexes

ISBN-13: 9789401041683 / Angielski / Miękka / 2012 / 213 str.

Calin-Grigore Ambrozie;Florian Horia Vasilescu

Opis

This book offers a systematic approach to the study of those properties of Banach space complexes that are stable under certain perturbations. The stability of the index under small or compact perturbations is presented within the context of (semi-)Fredholm complexes. Various invariants and other properties are also considered. This raises certain problems requiring further study of more general Fredholm-type objects. Some of the results are new. Applications in several variables spectral theory and in other related fields are also given. Audience: This largely self-contained book will be of interest to graduate students and specialists in functional analysis, operator theory, integral transforms, operational calculus, partial differential equations and several complex variables.

Spis treści

Introduction. I: Preliminaries. 1. Algebraic prerequisites. 2. Algebraic Fredholm pairs. 3. Paraclosed linear transformations. 4. Homogeneous operators. 5. Linear and homogeneous projections and liftings. 6. The gap between two closed subspaces. 7. Linear operators with closed range, and finite extensions. 8. Metric relations and duality. 9. Operators in quotient Banach spaces. 10. References and comments. II: Semi-Fredholm complexes. 1. Semi-Fredholm operators. 2. Semi-Fredholm complexes. 3. Essential complexes. 4. Fredholm pairs. 5. Other continuous invariants. 6. References and comments. III: Related topics. 1. Joint spectra and perturbations. 2. Spectral interpolation and perturbations. 3. Versions of Poincaré's and Grothendieck's lemmas. 4. Differentiable families of partial differential operators. 5. References and comments. Subject index. Notations. Bibliography.