Autor:	Halgwrd M. Darwesh, Sarhad F Nami
Rok vydání:	2018
Předmět:	Set (abstract data type) Pure mathematics Closure (topology) Point (geometry) Topological space Space (mathematics) Mathematics
Zdroj:	Journal of Garmian University. 5:229-246
ISSN:	2522-3879
DOI:	10.24271/garmian.339
Popis:	Using the concept of preopen set, we introduce and study closure properties of pre-limit points, pre-derived sets, pre-interior and pre-closure of a set, pre-interior points,pre-border, pre-frontier and pre-exterior in closure space. The relations between pre-closure of a set and pre-interior (point) in closure spaces and pre-closure of a set andpre-interior (point) in topological space are investigated.
Databáze:	OpenAIRE
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