University of Guilan Journal of Algebra and Related Topics 2345-3931 9 2 2021 12 01 Semi-topological UP-algebras 1 22 5152 10.22124/jart.2021.18760.1249 EN A. B. Khalaf Department of Mathematics, College of Science, University of Duhok, Kurdistan Region, Iraq. M. A. Yousef Department of Mathematics, College of Basic Education, University of Duhok, Kurdistan Region, Iraq Journal Article 2021 01 29 The aim of this paper is to study the concept of semi-topological UP-algebras which is a UP-algebra supplied with a certain type of topology that makes the binary operation defined on it semi-topologically continuous. This concept is a generalization of the concept of topological UP-algebra. We obtain several properties of semi-topological UP-algebras . Furthermore, we introduce and study the concepts of semi(resp., s, irresolute)-topological UP-homomorphisms and some topological structures on certain types of UP-algebras. https://jart.guilan.ac.ir/article_5152_4539ac967420a1ee6385956f0c1304f3.pdf