Definition:Affine Frame

Definition
Let $\mathcal E$ be an affine space with difference space $V$.

An affine frame in $\mathcal E$ is an ordered tuple $\left(p_0,e_1,\ldots,e_n\right)$, where
 * $p_0$ is an element of $\mathcal E$ called the origin
 * $\left(e_1,\ldots,e_n\right)$ is a basis for $V$