ScalingStacks

Theorem A . [014Q]

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Theorem A.

Let (Ξ½t)tβˆˆπ”»βˆ—(\nu_{t})_{t\in{\mathbb{D}}^{*}} be a family of volume forms on a holomorphic family Xβ†’π”»βˆ—X\to{\mathbb{D}}^{*} of compact complex manifolds, with analytic singularities at t=0t=0. The asymptotic behavior of the total mass of Ξ½t\nu_{t} is then given by

Ξ½t​(Xt)∼c​|t|2​κmin​(log⁑|t|βˆ’1)d\nu_{t}(X_{t})\sim c|t|^{2\kappa_{\min}}(\log|t|^{-1})^{d}

with cβˆˆβ„+βˆ—c\in{\mathbb{R}}_{+}^{*}, ΞΊminβˆˆβ„š\kappa_{\min}\in{\mathbb{Q}} and dβˆˆβ„•βˆ—d\in{\mathbb{N}}^{*}, where d≀n:=dimXtd\leq n:=\dim X_{t}. Further, given any snc model 𝒳→𝔻{\mathcal{X}}\to{\mathbb{D}} of Xβ†’π”»βˆ—X\to{\mathbb{D}}^{*} such that KX/π”»βˆ—K_{X/{\mathbb{D}}^{*}} extends to a β„š{\mathbb{Q}}-line bundle on β„’{\mathcal{L}} on 𝒳{\mathcal{X}} and ψ\psi extends to a continuous metric on β„’{\mathcal{L}}, the rescaled measures

ΞΌt:=Ξ½t|t|2​κmin​(2​π​log⁑|t|βˆ’1)d,\mu_{t}:=\frac{\nu_{t}}{|t|^{2\kappa_{\min}}(2\pi\log|t|^{-1})^{d}},

viewed as measures on 𝒳hyb{\mathcal{X}}^{\mathrm{hyb}}, converge weakly to a Lebesgue type measure ΞΌ0\mu_{0} on a dd-dimensional subcomplex Δ⁑(β„’)\Delta({\mathcal{L}}) of Δ⁑(𝒳)\Delta({\mathcal{X}}).

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