Group Homomorphisms
A group homomorphism is a function between two groups that preserves the group operation. Specifically, if f: G \to H is a homomorphism from group G to group H , then for any elements a, b in G , the equation f(a \cdot b) = f(a) \cdot f(b) holds true. This means that the image of the product of two elements in G is the product of their images in H .
Homomorphisms are important in the study of algebraic structures because they allow mathematicians to understand how groups relate to each other. They can be used to define concepts like isomorphisms (which are bijective homomorphisms) and kernels, which help in analyzing the structure of groups. Understanding group homomorphisms is essential in fields such as abstract algebra and {number theory