computing fundamental group of $S^1 \times S^1$
55652
Fundamental group of the torus
47522
group generators of $(\mathbb Z_{17}-\{0\},\times)$
58033
$G\times H\cong G$ with $H$ non-trivial
83061
Generating the symmetric group $S_n$
145000
Fundamental group of GL(n,C) is isomorphic to Z. How to learn to prove facts like this?
27652
metric on the Euclidean Group
72548
Lie group embeddings $SO(10) \supset SU(3) \times SU(2) \times U(1)?$
70861
$\mathbb P^n\times \mathbb P^m\not\cong \mathbb P^{m+n}$
71262
Subgroups of order $9$ isomorphic to $C_3 \times C_3$ in $S_6$
137691
What are the self-normalizing subgroups of $S_n$?
147968
Calculate the Factor Group $(\mathbb{Z}_4 \times \mathbb{Z}_6)/\langle(0,2)\rangle$
75127
Group $G$ of order $p^2$: $\;G\cong \mathbb Z_{p^2}$ or $G\cong \mathbb Z_p \times \mathbb Z_p$
67919
Subgroup of the unit circle under complex multiplication
52517
Construction of $\mathbb{CP}^2$ from $S^2\times S^2$
60981
Understanding relation between Quotient Space and $S^1$
90616
When is mapping $g$ to $g^{-1}$ a group homomorphism?
118299
Show that $(\mathbb{Z}[x]/(x^{n+1}))^{\times}\cong \mathbb{Z}/2\mathbb{Z}\times\Pi_{i=1}^n\mathbb{Z}$