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Affine Set

Last updated Nov 1, 2022

# Definition

Let $V$ be a Vector Space over $\mathbb{R}$ and $S \subset V$. $S$ is an Affine Set if for all $\lambda \in \mathbb{R}$ and all $u, v \in S$ $$\lambda u + (1 - \lambda) v \in S$$

# Remarks

  1. $S$ is an Affine Set If and Only If $S$ contains all Lines between its points. This is just a restatement of the definition of a Affine Set.

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