University of Guilan Journal of Algebra and Related Topics 2345-3931 10 1 2022 06 01 On Special Amalgams and Closed Varieties of Posemigroups 143 158 5622 10.22124/jart.2021.20345.1303 EN S. A. Ahanger Department of Mathematics, Central University of Kashmir, , Ganderbal, India S. Bano Department of Mathematics Central University of Kashmir, Ganderbal, India A. H. Shah Department of Mathematics, Central University of Kashmir, , Ganderbal, India Journal Article 2021 08 10 In this paper we extend a result of Scheiblich by showing that variety of po-normal bands is closed. We also extend the well known results to posemigroups namely, that pogroups and inverse posemigroups have special amalgamation property in the category of all posemigroups and commutative posemigroups, respectively. Finally, we find some varieties of posemigroups which are closed if they are self convex. https://jart.guilan.ac.ir/article_5622_71c3ec91e292acae17721021b90342fa.pdf