Template:Group-like structures: Difference between revisions

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Latest revision as of 09:51, 14 December 2022

Group-like structures
Totalityα Associativity Identity Inverse Commutativity
Semigroupoid Unneeded Required Unneeded Unneeded Unneeded
Small category Unneeded Required Required Unneeded Unneeded
Groupoid Unneeded Required Required Required Unneeded
Magma Required Unneeded Unneeded Unneeded Unneeded
Quasigroup Required Unneeded Unneeded Required Unneeded
Unital magma Required Unneeded Required Unneeded Unneeded
Semigroup Required Required Unneeded Unneeded Unneeded
Loop Required Unneeded Required Required Unneeded
Monoid Required Required Required Unneeded Unneeded
Group Required Required Required Required Unneeded
Commutative monoid Required Required Required Unneeded Required
Abelian group Required Required Required Required Required
The closure axiom, used by many sources and defined differently, is equivalent.