eng Science and Education Publishing Journal of Mathematical Sciences and Applications 2333-8792 2017-07-19 5 1 24 26 10.12691/jmsa-5-1-4 JMSA2017514 article Ali Ahmad Ali Fora afora_jo@yahoo.com 1 Department of Mathematics, Yarmok University, Irbid, Jordan We show the number of fuzzy clopen sets in an arbitrary fuzzy topological space can be any natural number greater than 1 if it is finite. We give an upper bound for this number. We shall also prove that the number of all crisp fuzzy clopen sets in an arbitrary fuzzy topological space is a power of 2 if it is finite. http://pubs.sciepub.com/jmsa/5/1/4/jmsa-5-1-4.pdf clopen enumerating finite set fuzzy clopen