On Limit sets of Monotone maps on Regular curves

TL;DR

This paper studies the structure of limit sets for monotone maps on regular curves, showing they are minimal sets and extending previous results for homeomorphisms and local dendrites.

Contribution

It proves that omega- and alpha-limit sets for monotone maps on regular curves are minimal, extending known results to broader classes of maps and spaces.

Findings

Omega-limit sets are minimal for all points.

Alpha-limit sets are minimal for non-periodic points.

Results extend previous work on homeomorphisms and local dendrites.

Abstract

We investigate the structure of $\omega$-limit (resp. $\alpha$-limit) sets for a monotone map $f$ on a regular curve $X$. %Let $X$ be a regular curve and let $f: X\longrightarrowX$ be a monotone map. We show that for any $x\in X$ (resp. for any negative orbit $(x_{n})_{n\geq 0}$ of $x$), the $\omega$-limit set $\omega_{f}(x)$ (resp. $\alpha$-limit set $\alpha_{f}((x_{n})_{n\geq 0})$) is a minimal set. This also hold for $\alpha$-limit set $\alpha_{f}(x)$ whenever $x$ is not a periodic point. These results extend those of Naghmouchi \cite{n} %[J. Difference Equ. Appl., 23 (2017), 1485--1490] established whenever $f$ is a homeomorphism on a regular curve and those of Abdelli \cite{a} %[Chaos, Solitons Fractals, 71 (2015), 66--72] , whenever $f$ is a monotone map on a local dendrite. Further results related to the basin of attraction of an infinite minimal set are also obtained.