ScalingStacks

Example 5.18 . [02TB]

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Example 5.18.

With the notation in Example 3.65, consider the standard simplex Δn\Delta^{n} with fan Σ=ΣΔn\Sigma=\Sigma_{\Delta^{n}} and support function Ψ=ΨΔn\Psi=\Psi_{\Delta^{n}}. The corresponding toric variety is XΣ=ℙnX_{\Sigma}=\mathbb{P}^{n} with toric line bundle LΨ=𝒪⁡(1)L_{\Psi}=\mathcal{O}(1) and toric section sΨ=s∞s_{\Psi}=s_{\infty}.

  1. (1)

    The canonical metrics ∥⋅∥can\|\cdot\|_{{\operatorname{can}}} in examples 2.25 and 2.32 are toric and both correspond to the function ψ∥⋅∥can=Ψ\psi_{\|\cdot\|_{{\operatorname{can}}}}=\Psi.

  2. (2)

    The Fubini-Study metric ∥⋅∥FS\|\cdot\|_{{\operatorname{FS}}} in Example 2.2 is also toric and corresponds to the differentiable function ψ∥⋅∥FS=fFS\psi_{\|\cdot\|_{{\operatorname{FS}}}}=f_{{\operatorname{FS}}} introduced in Example 3.53.

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