projective plane and topology
12764
$\Bbb RP^2$ as the union of a Möbius band and a disc
116378
Nonhomeomorphic subsets of the plane
24039
Fundamental Group of Punctured Plane
154534
consider the following subsets of complex plane
16768
Different definitions of projective objects
117104
Is the punctured plane homotopy equivalent to the circle?
107943
Applications of Algebraic Topology to physics
135025
Axiomatization of a Topology using the Boundary
146261
Difference between topology and sigma-algebra axioms.
149999
fixed point of a continuous map on a projective space
106298
Prove that some topology is not metrizable
70218
Flat not projective, projective not free
41047
Subspace Topology of a subset
16517
Arcwise connected part of $\mathbb R^2$
115014
Classification of automorphisms of projective space
27661
The closed graph theorem in topology
133808
A doubt from Milnor's "Topology from a Differentiable Viewpoint".