Infinite cancellative commutative monoids
Up:
Monoid enumeration
2 unique, 10 total
Σ
#
Presentation
Properties
Description
φ
3
7
⟨
a
,
b
|
aa
=
b
⟩
Can
Com
Inf
ℕ
8
4
22
⟨
a
,
b
|
ba
=
ab
⟩
Can
Com
Inf
ℕ ⊕ ℕ