A smooth function separating two disjoint closed subsets
88173
Finding bump function on a smooth manifold using partitions of unity.
79531
Distance between sets with one closed set and one compact set
41611
Open and closed set in n by n matrices space.
30572
Intersection of nested closed bounded convex sets in Euclidean space
127678
A partition of the unit interval into uncountably many dense uncountable subsets
57822
Number of ways to choose two disjoint subsets of a set
5448
Finding the closure of some subsets of the ordered square
47680
Prove that the union of the interior of a set and the boundary of the set is the closure of the set
35804
Bi-Lipschitz map preserves completeness
143586
Is $[0,1]$ a union of family of disjoint closed intervals?
92202
Linear separability for a sum of kernel functions
48764
Increasing real valued function whose image set is connected
113594
Convex combination of quasiconvex functions.
11383
Disjoint compact sets in a Hausdorff space can be separated
127338
Intuitive characterization of the graph of a twice differentiable function
151947
Finding a pair of functions with properties
152193
The intersection of a closure with an open set