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On shadowing and chain recurrence in linear dynamics. (English) Zbl 1540.37039

Summary: In the present work we study the concepts of shadowing and chain recurrence in the setting of linear dynamics. We prove that shadowing and finite shadowing always coincide for operators on Banach spaces, but we exhibit operators on the Fréchet space \(H(\mathbb{C})\) of entire functions that have the finite shadowing property but do not have the shadowing property. We establish a characterization of mixing for continuous maps with the finite shadowing property in the setting of uniform spaces, which implies that chain recurrence and mixing coincide for operators with the finite shadowing property on any topological vector space. We establish a characterization of dense distributional chaos for operators with the finite shadowing property on Fréchet spaces. As a consequence, we prove that if a Devaney chaotic (resp. a chain recurrent) operator on a Fréchet space (resp. on a Banach space) has the finite shadowing property, then it is densely distributionally chaotic. We obtain complete characterizations of chain recurrence for weighted shifts on Fréchet sequence spaces. We prove that generalized hyperbolicity implies periodic shadowing for operators on Banach spaces. Moreover, the concepts of shadowing and periodic shadowing coincide for unilateral weighted backward shifts, but these notions do not coincide in general, even for bilateral weighted shifts.

MSC:

37B65 Approximate trajectories, pseudotrajectories, shadowing and related notions for topological dynamical systems
37B20 Notions of recurrence and recurrent behavior in topological dynamical systems
47A16 Cyclic vectors, hypercyclic and chaotic operators
47B37 Linear operators on special spaces (weighted shifts, operators on sequence spaces, etc.)
46A45 Sequence spaces (including Köthe sequence spaces)

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