Definition:Ring of Mappings/Unity

Definition
Let $\struct {R, +, \circ}$ be a ring with unity whose unity is $1$. Let $S$ be a set.

Let $\struct {R^S, +', \circ'}$ be the ring of mappings from $S$ to $R$.

From Structure Induced by Ring with Unity Operations is Ring with Unity, the ring of mappings from $S$ to $R$ is a ring with unity whose unity is the constant mapping $f_1: S \to R$ defined as:
 * $\quad \forall s \in S : \map {f_1} x = 1$

Also see

 * Structure Induced by Ring Operations is Ring


 * Structure Induced by Ring with Unity Operations is Ring with Unity