Definition 41.2.3 (Positive Cone).label Let $A$ be a $C^{*}$-algebra and $S \subset A$ be an operator system, then $S_{+}= \bracsn{x \in S_{sa}|x \ge 0}$ is the positive cone of $S$.
Definition 41.2.3 (Positive Cone).label Let $A$ be a $C^{*}$-algebra and $S \subset A$ be an operator system, then $S_{+}= \bracsn{x \in S_{sa}|x \ge 0}$ is the positive cone of $S$.
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