@article{anvari_atapour, title={Some Topological Properties of Semi-Dynamical Systems}, abstractNote={Recently there has been an extensive study on Relative Semi-Dynamical Systems (RSD-Systems). In this paper, we explore some topological properties of RSD-systems. Here, in particular, minimal RSD-systems are characterized and transitive homeomorphisms are investigated. Moreover, α-level relative topological entropy is extended to RSD-systems. Finally, as a computational example, we develop an RSD-system over the polynomial function space R[x] based on the derivative operator; we also calculate α-level relative topological entropy for this system.}, author={Anvari and Atapour} }