Ring homomorphism

Common card · No. 477488

In mathematics, a ring homomorphism is a structure-preserving function between two rings. More explicitly, if R and S are rings, then a ring homomorphism is a function f : R → S that preserves addition, multiplication and multiplicative identity; that is, f ( a + b ) = f ( a ) + f ( b ) , f ( a b ) = f ( a ) f (...