Why does this variant of comb space have no universal cover?
121226
Comb space has no simply connected cover
95234
Quasi-components in compact space
114856
Universal property of initial topology
88595
Prob. 21, Sec. 17 in Munkres' TOPOLOGY, 2nd ed: Closure and complementation can result in at most 14 different sets
70198
Why this two spaces do not homeomorphic?
31198
Wrapping long lines that contain no spaces
143043
When is a local homeomorphism a covering map?
81479
Inhomogeneous space between glossary items
138233
Why does the boundary of the Mandelbrot set contain a cardioid?
83218
non-invasive kerning/spacing modification: what options are there?
151950
Why is indiscrete topology unmetrizable?
19499
Why is cross product only defined in 3 and 7 dimensions?
115851
Why is this quotient space not Hausdorff?
68243
Why does Plot3D omit parts of the surface at kinks?
24975
Weird free spaces estimation
147285
baselinestretch vs. setspace
101090
Why exactly do sometimes universal covers, and sometimes central extensions feature in the application of a symmetry group to quantum physics?