Meaning of ultrafilter
Pronunciation: (ul"tru-fil'tur), [key]
- a filter for purifying sols, having a membrane with pores sufficiently small to prevent the passage of the suspended particles.
- a filter in a topological space, having the property that no other filter exists in the space having among its subsets all the subsets in the given filter.
- to purify by means of an ultrafilter.