Infinite abelian group counterexample
67694
Nonabelian group with all irreducible representations one-dimensional
71420
Prove that a group is abelian.
43894
If $S$ is an infinite $\sigma$ algebra on $X$ then $S$ is not countable
9232
Group with proper subgroups infinite cyclic
10816
Infinitely generated subgroup of a finitely one (weird)
87534
Finitely generated group which is not finitely presented
88718
A group is generated by two elements of order $2$ is infinite and non-abelian
53525
Infiniteness of non-twin primes.
102912
Subgroups of finitely generated groups are not necessarily finitely generated
64193
Cardinality of Infinite Symmetric group
18415
Direct sum of Abelian groups and Isomorphism
76597
Examples of provably${}^n$ unprovable statements
43783
Abelian group (Commutative group)
59811
Finite Abelian groups with the same number of elements for all orders are isomorphic
60208
Proof of property of abelian group
71035
Non abelian subgroup of a abelian group.
153100
A counterexample to "$k\mid n$ if and only if $k\mid n^2$"