Homeomorphic punctured planes
1756
1-point compactification and embedding
6323
existence of complex structure in dimension 2
33140
Two non-homeomorphic spaces with continuous bijective functions in both directions
143831
Showing $\mathbb{Q}$ is homeomorphic to $\mathbb{Q}^2$
666
Prove that the upper half plane of Cartesian plane is not an affine variety
89380
A positive harmonic function on the punctured plane is constant
82458
Homeomorphism between the unit disc and the unit square
145419
Hopf fibration Poincaré surface of section
117151
Conformal automorphism of unit disk that interchanges two given points
112727
Surfaces in $\mathbb P^3$ not containing any line
128301
Homeomorphism from square to unit circle
153767
Singular points and tangent lines
70303
Parametric form of a plane
16860
set of almost complex structures on $\mathbb R^4$ as two disjoint spheres
13993
Can we prove $ℝ^n ∖ \{\text{straight line}\}$ and $ℝ^n ∖ \text{\{an axis\}}$ homeomorphic by proving their complements homeomorphic?
23414
Topologist's Sine Curve: A rigorous proof of why $\overline{S} = S \cup V$
123740
Conic in projective plane isomorphic to projective line