👉 In mathematics, a homomorphism is an important concept that describes how one mathematical structure (usually considered to be "inside") behaves when it is applied to another mathematical structure (also usually considered to be "outside"). A homomorphism between two structures is a function from the domain of one structure into the codomain. In other words, a homomorphism takes an element in one structure and returns an element in the other structure. For example, consider two sets: A = {1,