General Topology: pasting lemma problem
51156
Function is Continuous When Restricted to Closed Sets Which Cover the Space
59289
Nested Sequence of Topological Space and the Coherent Topology; Munkres Topology 35.9
137621
The Number of Topologies on a Finite Set
6118
Homeomorphism of the real line-Topology
6415
Distance function is continuous in topology induced by the metric
77563
Homeomorphism between spaces equipped with cofinite topologies
126944
Metric spaces problem
77210
Zorn's Lemma and Posets
147961
Characterizing simply connected spaces
116768
Problem 5, sec. 13 in Munkres' Topology, 2nd ed.: How to prove the assertion if $\mathscr{A}$ is a subbasis?
56646
Arithmetic progression topology
2575
Showing that $\mathbb{R}$ is connected
48557
Product of connected spaces
78624
CW complexes and manifolds
99353
Topology on cartesian product and product topology.
144548
topological structure on smooth manifolds
150011
Proof completeness of $(X,d)$ given $d$ is French railway metric