On H-closed and U-closed functions

  • Filippo Cammaroto
  • Andrei Catalioto
  • Jack Porter

Abstract

In this article, we extend the work on H-closed functions started by Cammaroto, Fedorchuk and Porter in 1998. Also, U-closed functions are introduced and characterized in terms of filters and adherence. The hereditary and productivity properties are examined and developed for both H-closed and U-closed functions.

Quaestiones Mathematicae 35(2012), 181–194

Author Biographies

Filippo Cammaroto
Dipartimento di Matematica, Università di Messina, Viale Ferdinando Stagno D’Alcontres 31, S. Agata 98166, Messina, Italy
Andrei Catalioto
Dipartimento di Matematica, Università di Messina, Viale Ferdinando Stagno D’Alcontres 31, S. Agata 98166, Messina, Italy
Jack Porter
Department of Mathematics, University of Kansas, 1460 Jayhawk Blvd. (Snow Hall), Lawrence, KS 66045-7594, USA
Section
Articles

Journal Identifiers


eISSN: 1727-933X
print ISSN: 1607-3606