Asymptotic Behavior of Individual Orbits of Discrete Systems

Details Asymptotic Behavior of Individual Orbits of Discrete Systems Asymptotic Behavior of Individual Orbits of Discrete Systems

2008-11-04

arxiv.org/abs/0811.0544v4

Mathematics

Dynamical Systems

Scientific paper

We consider the asymptotic behavior of bounded solutions of the difference equations of the form $x(n+1)=Bx(n) + y(n)$ in a Banach space $\X$, where $n=1,2,...$, $B$ is a linear continuous operator in $\X$, and $(y(n))$ is a sequence in $\X$ converging to 0 as $n\to\infty$. An obtained result with an elementary proof says that if $\sigma (B) \cap \{|z|=1\} \subset \{1\}$, then every bounded solution $x(n)$ has the property that $\lim_{n\to\infty} (x(n+1)-x(n)) =0$. This result extends a theorem due to Katznelson-Tzafriri. Moreover, the techniques of the proof are furthered to study the individual stability of solutions of the discrete system. A discussion on further extensions is also given.

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