The infinite intersection of finite sets
106455
intersection of infinite collection of finite sets?
97064
Dense set in an infinite cofinite space
78117
Closed property of nonempty finite set
139826
arbitrary large finite sums of an uncountable set.
89506
Union of disjoint sets : Equivalence relations
141806
Prove that a nest of sets has an empty intersection
157753
Show that any set in a metric space can be written as the intersection of open sets
55648
Intersection of finite number of compact sets is compact?
137621
The Number of Topologies on a Finite Set
152193
The intersection of a closure with an open set
74311
Proving that the Intersection of any Collection of Compact Sets is Compact
41783
Cardinality of the Cartesian Product of Two Equinumerous Infinite Sets
16654
Unions and Intersections of Open Sets are Open
133086
When Cantor's Intersection theorem won't work with closed sets
130156
Image of the union and intersection of sets.
33117
Cyclic containment of sets
70940
Homework - set theory infinite union