👉 In mathematics, a coadjoint or coadjointive is a concept where two elements of an algebraic structure are related by a homomorphism. A coadjoint between two algebraic structures A and B is a pair (f, g) such that for every element x in the domain A of f and every element y in the codomain B of g, we have: f(x) = g(f(y)). In other words, the function f maps elements from A to