The Characteristic Function of a Neutrosophic Set

The purpose of this paper is to introduce and study the characteristic function of a neutrosophic set.
After given the fundamental definitions of neutrosophic set operations generated by the characteristic function of a neutrosophic set ( for short), we obtain several properties, and discussed the relationship between
neutrosophic sets generated by Ng and others. Finally, we introduce the neutrosophic topological spaces
generated by . Possible application to GIS topology rules are touched upon.