Definition:Big Monoid Ring

Definition
Let $(M,\cdot)$ be a divisor-finite monoid.

Let $(R, +, \times)$ be an additive semiring.

Let $R^M$ be the set of all mappings $M \to R$.

The big monoid ring of $R$ over $M$ is the ringoid $(R^M, +, *)$ where:
 * $+$ is the pointwise operation induced by $+$
 * $*$ denotes convolution of mappings

Also see

 * Definition:Monoid Ring

Examples

 * Definition:Ring of Formal Power Series