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правок
Изменения
→Ring-like structures
|-
! [[Monoid]]
| Y || ? [http://www.proofwiki.org/wiki/Definition:Rig Rig] || N || N || ? || N || N
|-
! [[Monoid|Commutative monoid]]
| ? || ? [http://www.proofwiki.org/wiki/Definition:Rig Rig] || ? || ? || ? || ? || ?
|-
! [[Group (mathematics)|Group]]