Definition 4.3.1 (Extreme Point).label Let $E$ be a vector space over $\R$, $K\suf E$ and $x\in K$, then $x$ is extremal if there exists no $y,z\in K$ such that $x\in (y,z)\suf K$.
Definition 4.3.1 (Extreme Point).label Let $E$ be a vector space over $\R$, $K\suf E$ and $x\in K$, then $x$ is extremal if there exists no $y,z\in K$ such that $x\in (y,z)\suf K$.
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