Chaotic Banach algebras

Details Chaotic Banach algebras Chaotic Banach algebras

2010-08-19

arxiv.org/abs/1008.3271v1

Mathematics

Functional Analysis

Under consideration in Journal of Functional Analysis

Scientific paper

We construct an infinite dimensional non-unital Banach algebra $A$ and $a\in A$ such that the sets $\{za^n:z\in\C,\ n\in\N\}$ and $\{({\bf 1}+a)^na:n\in\N\}$ are both dense in $A$, where $\bf 1$ is the unity in the unitalization $A^{\#}=A\oplus \spann\{{\bf 1}\}$ of $A$. As a byproduct, we get a hypercyclic operator $T$ on a Banach space such that $T\oplus T$ is non-cyclic and $\sigma(T)=\{1\}$.

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