# Definition:Tangent Map

## Definition

### Affine Transformation

Let $\mathcal E$ and $\mathcal F$ be affine spaces with difference spaces $E$ and $F$ respectively.

Let $\mathcal L : \mathcal E \to \mathcal F$ be an affine transformation.

The associated linear transformation $L: E \to F$ of difference spaces is called the tangent map of $\mathcal L$.