Figure 21.12.5987E79283076
987E7928307621.12.5 The fan $\Sigma $ of $\mathbb {P}^1$ in $N_{\mathbb {R}}=\mathbb {R}$, consisting of the two rays $(-\infty ,0]$, $[0,\infty )$ and the cone $\{ 0\} $.Figure 21.12.5
PomePome987E79283076 987E7928307621.12.5 The fan $\Sigma $ of $\mathbb {P}^1$ in $N_{\mathbb {R}}=\mathbb {R}$, consisting of the two rays $(-\infty ,0]$, $[0,\infty )$ and the cone $\{ 0\} $.
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