On (h,k)-Dichotomies for Nonautonomous Linear Difference Equations in Banach Spaces

This paper considers two general concepts of dichotomy for noninvertible and nonautonomous linear discrete-time systems in Banach spaces. These concepts use two types of dichotomy projections sequences (invariant and strongly invariant) and generalize some well-known dichotomy concepts (uniform, non...

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Bibliographic Details
Main Authors: Mihai Gabriel Babuţia, Mihail Megan, Ioan-Lucian Popa
Format: Article
Language:English
Published: Hindawi Limited 2013-01-01
Series:International Journal of Differential Equations
Online Access:http://dx.doi.org/10.1155/2013/761680
Description
Summary:This paper considers two general concepts of dichotomy for noninvertible and nonautonomous linear discrete-time systems in Banach spaces. These concepts use two types of dichotomy projections sequences (invariant and strongly invariant) and generalize some well-known dichotomy concepts (uniform, nonuniform, exponential, and polynomial). In the particular case of strongly invariant dichotomy projections, we present characterizations of these sequences and connections with other dichotomy concepts existent in the literature. Some illustrative examples clarify the implications between these concepts.
ISSN:1687-9643
1687-9651