On weak supercyclicity II |
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Authors: | Carlos S. Kubrusly Bhagwati P. Duggal |
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Affiliation: | 1.Department of Applied Mathematics, Mathematics Institute,Federal University of Rio de Janeiro,Rio de Janeiro,Brazil;2.8 Redwood Grove,Ealing, London,United Kingdom |
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Abstract: | This paper considers weak supercyclicity for bounded linear operators on a normed space. On the one hand, weak supercyclicity is investigated for classes of Hilbertspace operators: (i) self-adjoint operators are not weakly supercyclic, (ii) diagonalizable operators are not weakly l-sequentially supercyclic, and (iii) weak l-sequential supercyclicity is preserved between a unitary operator and its adjoint. On the other hand, weak supercyclicity is investigated for classes of normed-space operators: (iv) the point spectrum of the normed-space adjoint of a power bounded supercyclic operator is either empty or is a singleton in the open unit disk, (v) weak l-sequential supercyclicity coincides with supercyclicity for compact operators, and (vi) every compact weakly l-sequentially supercyclic operator is quasinilpotent. |
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