Package Usage: hackage: semigroups

In mathematics, a semigroup is an algebraic structure consisting of a set together with an associative binary operation. A semigroup generalizes a monoid in that there might not exist an identity element. It also (originally) generalized a group (a monoid with all inverses) to a type where every element did not have to have an inverse, thus the name semigroup.
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View more package details: https://packages.ecosystem.code.gouv.fr/registries/hackage.haskell.org/packages/semigroups