What's the quotient space of torus $S^1\times S^1$ under equivalence relation $(z,w)\sim (w,z)$
136811
Orbit space of torus homeomorphic to mobius strip
145220
Homology Groups of $S^n$
108325
What's the relationship between $SL(2,\mathbb{C})$, $SU(2)\times SU(2)$ and $SO(1,3)$?
72211
Isomorphism involving Eilenberg-Maclane space, Tors.
62566
Does $X\times S^1\cong Y\times S^1$ imply that $X\times\mathbb R\cong Y\times\mathbb R$?
52556
Isomorphism of $S^1$.
102485
Showing that a topological space is ${\rm T}_1$
16512
Product of $T_1$ spaces is $T_1$
6227
Showing diffeomorphism between $S^1 \subset \mathbb{R}^2$ and $\mathbb{RP}^1$
94018
Homology groups of $\mathbb{R}^3\setminus \ S^1$ and $\mathbb{R}^3\setminus E^1_+$
2871
Spaces with equal homotopy groups but different homology groups?
44559
Finding a homeomorphism $\mathbb{R} \times S^1 \to \mathbb{R}^2 \setminus \{(0,0)\}$
74024
Higher dimensional equivalent of complex numbers
141190
Fundamental group of mapping torus?
142698
Proving that the fundamental groups of two spaces with same homotopy type are isomorphic
101860
Relating the normal bundle and trivial bundles of $S^n$ to the tautological and trivial line bundles of $\mathbb{R}P^n$
107076
Prove $S^1$ is not homeomorphic to $S^2$ using connectedness