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17
Homotopy equivalent but non-homeomorphic high-dimensional manifolds
Apr 6
question
8
Non-compact three-manifolds with the same proper homotopy type are homeomorphic?
Dec 16, 2022
question
7
Stallings' binding tie
Sep 8, 2021
question
7
If the number of ends of Freudenthal space is infinite, then its space of ends is homeomorphic to the Cantor set?
Dec 5, 2022
question
6
What is the minimum $n$ for which $\Bbb H^3$ can be isometrically embedded in $\Bbb R^n$ as a bounded set?
Jan 7, 2023
question
5
Earliest known proof of "Any degree one self-map of an orientable connected finite-type non-compact surface is homotopic to a homeomorphism"
Sep 5, 2022
question
5
How many pairwise non-homeomorphic non-empty closed subsets of the Cantor set are there? [duplicate]
Nov 12, 2022
question
5
The fundamental group of the complement of badly embedded open $n$-ball in $\Bbb R^n$
Dec 3, 2022
question
4
Inequivalent free $\Bbb Z/n\Bbb Z$-actions on orientable compact bordered surface
Dec 11, 2021
question
4
Characterization of a non-trivial non-peripheral element of the free homotopy classes of a compact bordered surface
Sep 21, 2022
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Orientable vs Oriented connected sum