Transitivities of maps of generalized topological spaces

Abstract

In this work, we present several new findings regarding the concepts of orbit-transitivity, strict orbit-transitivity, $ω$-transitivity, and $μ$-open-set transitivity for self-maps on generalized topological spaces. Let $(X,μ)$ denote a generalized topological space. A point $x \in X$ is said to be \textit{quasi-$μ$-isolated} if there exists a $μ$-open set $U$ such that $x \in U$ and $i_μ(U \setminus c_μ(\{x\})) = \emptyset$. We prove that $x$ is a quasi-$μ$-isolated point of $X$ precisely when there exists a $μ$-dense subset $D$ of $X$ for which $x$ is a $μ_D$-isolated point of $D$. Moreover, in the case where $X$ has no quasi-$μ$-isolated points, we establish that a map $f: X \to X$ is orbit-transitive (or strictly orbit-transitive) if and only if it is $ω$-transitive.