International Journal of Mathematics and Mathematical Sciences 
Volume 23 (2000), Issue 4, Pages 253-259
doi:10.1155/S0161171200001502

Weak and strong forms of irresolute maps

Miguel Caldas Cueva

 Departamento of Matemática, Aplicada-IMUFF, Universidade Federal Fluminense, Rua Mário Santos Braga s/no, Niterói CEP: 24020-140, RJ, Brazil
Received 23 March 1998; Revised 29 July 1998

Abstract

We consider new weak and stronger forms of irresolute and semi-closure via the concept sg-closed sets which we call ap-irresolute maps, ap-semi-closed maps and contra-irresolute and use it to obtain a characterization of semi-T1/2 spaces.