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Prove that there is a two-sheeted covering of the Klein bottle by the torus
general-topology
algebraic-topology
covering-spaces
klein-bottle
Prove or disprove that $\mathbb{S}^4$ is a covering space of $\mathbb{C}\text{P}^2$
algebraic-topology
differential-topology
covering-spaces
topologic view on FO
general-topology
logic
algebraic-topology
first-order-logic
Why are homeomorphisms important?
algebraic-topology
soft-question
Use of Reduced Homology
algebraic-topology
homology-cohomology
Homology of cube with a twist
algebraic-topology
"the only odd dimensional spheres with a unique smooth structure are $S^1$, $S^3$, $S^5$, $S^{61}$"
differential-geometry
algebraic-topology
differential-topology
Fundamental group of a torus with points removed
algebraic-topology
fundamental-groups
Relative homology and path connected space 2
algebraic-topology
Why is the Jordan Curve Theorem not "obvious"?
algebraic-topology
intuition
geometric-topology
How To Present Algebraic Topology To Non-Mathematicians?
algebraic-topology
soft-question
education
big-list
How much rigour is necessary?
algebraic-topology
soft-question
How can I prove formally that the projective plane is a Hausdorff space?
general-topology
algebraic-topology
Research in algebraic topology
algebraic-topology
soft-question
Meaning of relative homology
algebraic-topology
How to interpret the Euler class?
algebraic-topology
characteristic-classes
Compact subset in colimit of spaces
general-topology
algebraic-topology
compactness
limits-colimits
Presentation $\langle x,y,z\mid xyx^{-1}y^{-2},yzy^{-1}z^{-2},zxz^{-1}x^{-2}\rangle$ of group equal to trivial group
abstract-algebra
group-theory
algebraic-topology
group-presentation
$\pi_{1}({\mathbb R}^{2} - {\mathbb Q}^{2})$ is uncountable
algebraic-topology
fundamental-groups
Has anyone ever actually seen this Daniel Biss paper?
geometry
reference-request
algebraic-topology
simplicial-complex
popular-math
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