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    A hypercyclic finite rank perturbation of a unitary operator

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    A unitary operator VV and a rank 22 operator RR acting on a Hilbert space \H are constructed such that V+RV+R is hypercyclic. This answers affirmatively a question of Salas whether a finite rank perturbation of a hyponormal operator can be supercyclic.Comment: published in Mathematische Annale
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