the open sets $X_ s$, with $s \in S_{+}$ homogeneous, cover $X$ and the associated morphism $X \to \text{Proj}(S)$ is an open immersion,
the open sets $X_ s$, with $s \in S_{+}$ homogeneous, cover $X$ and the associated morphism $X \to \text{Proj}(S)$ is an open immersion,
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