%0 Journal Article %A Gallego Lupiáñez, Francisco %T Invariance of fuzzy properties. %D 1998 %@ 0025-5165 %U https://hdl.handle.net/20.500.14352/57496 %X In this paper we study the invariance and the inverse invariance under fuzzy closed, fuzzy open, and various kinds of fuzzy perfect maps, of dierent properties of fuzzy topological spaces. %~