On proximal relations in transformation semigroups arising from generalized shifts
Dynamical Systems
2024-01-19 v1
Abstract
For a finite discrete topological space X with at least two elements, a nonempty set Γ, and a map φ:Γ→Γ, σφ:XΓ→XΓ with σφ((xα)α∈Γ)=(xφ(α))α∈Γ (for (xα)α∈Γ∈XΓ) is a generalized shift. In this text for S={σψ:ψ∈ΓΓ} and H={σψ:Γ→ψΓ is bijective} we study proximal relations of transformation semigroups (S,XΓ) and (H,XΓ). Regarding proximal relation we prove: P(S,XΓ)={((xα)α∈Γ,(yα)α∈Γ)∈XΓ×XΓ:∃β∈Γ(xβ=yβ)} and P(H,XΓ)⊆{((xα)α∈Γ,(yα)α∈Γ)∈XΓ×XΓ:{β∈Γ:xβ=yβ} is infinite~}∪{(x,x):x∈X}. \\ Moreover, for infinite Γ, both transformation semigroups (S,XΓ) and (H,XΓ) are regionally proximal, i.e., Q(S,XΓ)=Q(H,XΓ)=XΓ×XΓ, also for sydetically proximal relation we have L(H,XΓ)={((xα)α∈Γ,(yα)α∈Γ)∈XΓ×XΓ:{γ∈Γ:xγ=yγ} is finite}.
Cite
@article{arxiv.1909.13100,
title = {On proximal relations in transformation semigroups arising from generalized shifts},
author = {Fatemah Ayatollah Zadeh Shirazi and Amir Fallahpour and Mohammad Reza Mardanbeigi and Zahra Nili Ahmadabadi},
journal= {arXiv preprint arXiv:1909.13100},
year = {2024}
}
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8 pages