meager set=set of first category
close small set and open large-scale set
cut set of dynamic fuzzy set
cut set of the lattice interval fuzzy set
Dividing calibration set and prediction set
extension set [= extension telephone set]
fuzzy maximizing set and minimizing set
low set in place of high set
Nearest Ordinary Set of a Fuzzy Set
positive invariant set and attracting set
set of similar word set
set-valued 1-set-contractive mapping