Definition:Vector Space on Cartesian Product

Theorem
Let $\struct {K, +, \circ}$ be a division ring.

Let the $K$-module $K^n$ be defined as in Module on Cartesian Product.

Then $\struct {K^n, +, \times}_K$ is a $K$-vector space.

This will be referred to as the $K$-vector space $K^n$.

Proof
This is a special case of the Vector Space of All Mappings, where $S$ is the set $\closedint 1 n \subset \N^*$.

It is also a special case of a direct product of vector spaces where each of the $G_k$ is the $K$-vector space $K$.