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Infinite Abelian groups
3 unique, 638 total
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4
〈
a
,
b
|
ab
=
1
,
ba
=
1
〉
Isomorphic to ℤ
601 isomorphic
8
〈
a
,
b
|
aabb
=
1
,
baba
=
1
〉
Isomorphic to ℤ
2
⊕ ℤ
28 isomorphic
10
〈
a
,
b
|
ba
=
ab
,
aaabbb
=
1
〉
Isomorphic to ℤ
3
⊕ ℤ
6 isomorphic