On Two Types of Fuzzy Closed Sets
نویسندگان
چکیده
Varius concepts related to the category of fuzzy closure spaces have been introduced, and relations among them are studied by several authors [4-8]. in this paper, we introduce the weak fuzzy closure operators which need not preserve unions, showing that many concepts and properties of the category of closure spaces (FCS) can be proved under such weakened conditions. Initial structures of weak fuzzy closure spaces are obtained. Two notions of closed fuzzy sets, one in terms of fuzzy sets and the other in terms of fuzzy points, are introduced. The interrelations between these two notions are studied, provided with some counterexamples.
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