a proper mapping is a closed mapping
97761
Show that a proper continuous map from $X$ to locally compact $Y$ is closed
12293
Let X be a T1 space, and show that X is normal if and only if each neighbourhood of a closed set F contains the closure of some neighbourhood of F
15508
Projection map being a closed map
5802
Proving the universal mapping property for polynomial rings
152193
The intersection of a closure with an open set
106534
"Closed subsets of compact space are compact" with an alternative definition of covering
35804
Bi-Lipschitz map preserves completeness
121135
Why don't we use closed covers to define compactness of metric space?
24050
Characterization of the Closure of a Set
125962
The set $A'$ is closed in a $T_1$ space
3896
A closed set in $(A, \mathcal T_A)$ that is not closed in $(X, \mathcal T)$
127173
Closed subset of compact set is compact
52388
The equivalence of open-set definition of continuous mappings to the $\epsilon-\delta$ definition
61930
Intersection of Closed and Compact Set is Closed
148992
A finite set is closed
32910
Completion and algebraic closure commutable
26563
Help completing a proof regarding an infinite family of nested closed subsets in a compact metric space