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On H-closed and U-closed functions

Filippo Cammaroto
Andrei Catalioto
Jack Porter


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

Journal Identifiers

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