集团—集团凝聚
Cluster-cluster aggregate
紧闭子集集开子集
compactly closed subset compactly open subset
F强半开集
fuzzy strongly semiopen sets
LF正则准半开集
LF regularly pre-semiopen set
L-smooth r-半预开集
L-smooth r-semi-preopen sets
L-smooth-半预开集
L-smooth r-semi-preopen sets