KnowraSemigroupLinked fromLinked fromThe 12 pages that link to Semigroup, each with the reason it gives.All 12Broader topic 4Related 1Narrower topic 2Compared with 5Identity elementNarrower topic: Adding an identity to a semigroup produces a monoid.MonoidNarrower topic: A monoid is precisely a semigroup equipped with an identity element.