Orbits of the backward shifts with limit points

E Abakumov, A Abbar - Journal of Mathematical Analysis and Applications, 2024 - Elsevier
We show that the bilateral backward shift on ℓ p (Z, ω) that has a projective orbit with a non-
zero limit point is supercyclic. This phenomenon holds also for Γ-supercyclicity, which …

Frequently recurrent backward shifts

R Cardeccia, S Muro - arXiv preprint arXiv:2407.11799, 2024 - arxiv.org
We study frequently recurrent unilateral and bilateral backward shift operators on Fr\'echet
sequence spaces. We prove that if a backward shift admits a non-zero frequently recurrent …

Γ-supercyclicity of families of translates in weighted Lp-spaces on locally compact groups

A Abbar, Y Kuznetsova - Journal of Mathematical Analysis and Applications, 2021 - Elsevier
Let ω be a weight function defined on a locally compact group G, 1⩽ p<+∞, S⊂ G and let us
assume that for any s∈ S, the left translation operator T s is continuous from the weighted L …

-Supercyclicity for Strongly Continuous Semigroups

A Abbar - Complex Analysis and Operator Theory, 2019 - Springer
We characterize the subsets Γ Γ of the complex plane CC for which the notion of Γ Γ-
supercyclicity for strongly continuous semigroups coincides with that of hypercyclicity. In …

On frequently supercyclic operators and an F_ {\Gamma}-hypercyclicity criterior with applications

TR Alves, G Botelho, VV Fávaro - arXiv preprint arXiv:2411.03179, 2024 - arxiv.org
Given a Furstenberg family F and a subset {\Gamma} of C, we introduce and explore the
notions of F_ {\Gamma}-hypercyclic operator and F-hypercyclic scalar set. First, the study of …

On several dynamical properties of shifts acting on directed trees

E Abakumov, A Abbar - arXiv preprint arXiv:2402.05038, 2024 - arxiv.org
This paper explores the notions of $\mathcal {F} $-transitivity and topological $\mathcal {F} $-
recurrence for backward shift operators on weighted $\ell^ p $-spaces and $ c_0 $-spaces …

[PDF][PDF] Г-supercyclicity for Bilateral Shift Operators and Translation Semigroups

A Abbar - 2019 - dspace.enu.kz
We characterize the Γ-supercyclicity of bilateral shift operators and translation semigroups in
weighted Lp spaces in terms of the weight and Γ. We survey the notion of S-density …

Hypercyclic subsets

S Charpentier, R Ernst - Journal d'Analyse Mathématique, 2020 - Springer
We completely characterize the finite-dimensional subsets C of any separable Hilbert space
for which the notion of C-hypercyclicity coincides with the notion of hypercyclicity, where an …

Orbits of homogeneous polynomials on Banach spaces

R Cardeccia, S Muro - Ergodic Theory and Dynamical Systems, 2021 - cambridge.org
We study the dynamics induced by homogeneous polynomials on Banach spaces. It is
known that no homogeneous polynomial defined on a Banach space can have a dense …

[PDF][PDF] CHARACTERIZATION OF DISKCYCLIC OPERATORS.

AM Abu Jahel, AY As' ad - IUG Journal for Natural Studies, 2021 - researchgate.net
In this article we discuss an interesting idea related to characte rization of diskcyclicity
phenomena. We use the Diskcyclic Crit erion to characterize the subsets Γ of ℂ for which the …