International Journal of Mathematics and Mathematical Sciences
Volume 23 (2000), Issue 4, Pages 253-259

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

Copyright © 2000 Miguel Caldas Cueva. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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.