English

Pointwise attractors which are not strict

Dynamical Systems 2023-10-20 v3 General Topology

Abstract

We deal with the finite family F\mathcal{F} of continuous maps on the Hausdorff space. A nonempty compact subset AA of such space is called a strict attractor if it has an open neighborhood UU such that A=limnFn(S)A=\lim_{n\to\infty}\mathcal{F}^n(S) for every nonempty compact SUS\subset U. Every strict attractor is a pointwise attractor, which means that the set {xX;limnFn(x)=A}\{x\in X ; \lim_{n\to\infty}\mathcal{F}^n(x)=A\} contains AA in its interior. We present a class of examples of pointwise attractors - from the finite set to the Sierpi\'nski carpet - which are not strict when we add to the system one nonexpansive map.

Keywords

Cite

@article{arxiv.2206.03244,
  title  = {Pointwise attractors which are not strict},
  author = {Magdalena Nowak},
  journal= {arXiv preprint arXiv:2206.03244},
  year   = {2023}
}
R2 v1 2026-06-24T11:41:55.807Z