040. Contra pre semi- open maps
Math. Journal: Kyungpook Math. Journal, Republic of Korea. 40 (2000), 379-389.
Authors: Caldas, M., and Baker, C.
Abstract
In this paper we consider a new generalization of an open map, which is called contra pre semi-open and continue the study of contra pre semi-closed maps i.e., the maps whose images of semi-closed sets are semi-open sets. This definitions enables us to obtain conditions under which inverse image of every subset from codomain is sg-closed. At the end of the note a discussion concerning the semi-closed graph Theorem for contra pre semi-open maps is also presented.
Filed Under: 1996-2000