👉 In mathematics, semigroups are a class of mathematical structures that generalize the concept of groups. A semigroup is an algebraic structure in which every element has an inverse (i.e., it has an identity element). In other words, a semigroup consists of two sets: the set of elements (usually denoted by S) and the set of "multiplication" operations on S.
A semigroup with one element is called a monoid. A semigroup with more than one element
semianalytical