Intersection of closed balls
109229
An Example of a Nested Decreasing Sequence of Bounded Closed Sets with Empty Intersection
144353
A closed ball in a metric space is closed
106756
Union and Intersection of Sets $A_{i}$ and $B_{j}$
111830
When is the closure of an open ball equal to the closed ball?
101504
An open ball is an open set
24045
Efficiently compute Intersection of two Sets in Java?
56800
Intersection of prime ideals
99341
Basic question: closure of irreducible sets
27689
Separability over intersection of intermediate fields
130156
Image of the union and intersection of sets.
130157
How to calculate the intersection of two sets?
41347
The dimension of the intersection of two vector subspaces
108619
Proving Baire's theorem: The intersection of a sequence of dense open subsets of a complete metric space is nonempty
36700
Quotient space of closed unit ball and the unit 2-sphere $S^2$
84921
Fitting an infinite collection of balls in an infinite dimensional unit ball
158523
Topology: Proof that a finitely generated cone is closed
156101
Is the convex hull of closed set in $\mathbb R^{n}$ is closed?