Hypercyclic tuples of operators on $C^n$ and $R^n$

Details Hypercyclic tuples of operators on $C^n$ and $R^n$ Hypercyclic tuples of operators on $C^n$ and $R^n$

2010-08-20

arxiv.org/abs/1008.3483v1

Mathematics

Dynamical Systems

Submitted to Linear and Multilinear Algebra

Scientific paper

A tuple $(T_1,\dots,T_n)$ of continuous linear operators on a topological vector space $X$ is called hypercyclic if there is $x\in X$ such that the the orbit of $x$ under the action of the semigroup generated by $T_1,\dots,T_n$ is dense in $X$. This concept was introduced by N.~Feldman, who have raised 7 questions on hypercyclic tuples. We answer those 4 of them, which can be dealt with on the level of operators on finite dimensional spaces. In particular, we prove that the minimal cardinality of a hypercyclcic tuple of operators on $C^n$ (respectively, on $R^n$) is $n+1$ (respectively, $\frac n2+\frac{5+(-1)^n}{4}$), that there are non-diagonalizable tuples of operators on $R^2$ which possess an orbit being neither dense nor nowhere dense and construct a hypercyclic 6-tuple of operators on $C^3$ such that every operator commuting with each member of the tuple is non-cyclic.

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