"Cyclicity of Vectors with Orbital Limit Points for Backward Shifts" by Kit Chan and Irina Seceleanu
 

Title

Cyclicity of Vectors with Orbital Limit Points for Backward Shifts

Publication Date

2014

Document Type

Article

Abstract

On a separable, infinite dimensional Banach space X, a bounded linear operator T : XX is said to be hypercyclic, if there exists a vector x in X such that its orbit Orb(T, x) = {x, Tx, T2x, …} is dense in X. In a recent paper (Chan and Seceleanu in J Oper Theory 67:257–277, 2012), it was shown that if a unilateral weighted backward shift has an orbit with a single non-zero limit point, then it possesses a dense orbit, and hence the shift is hypercyclic. However, the orbit with the non-zero limit point may not be dense, and so the vector x inducing the orbit need not be hypercyclic. Motivated by this result, we provide conditions for x to be a cyclic vector.

Original Citation

Chan, K. & Seceleanu, I. (2014). Cyclicity of Vectors with Orbital Limit Points for Backward Shifts. Integral Equations and Operator Theory, 78(2), 225-232. https://doi.org/10.1007/s00020-013-2100-2

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