Berkovich correspondence conjecture for deeper bubbles

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Let π ⁣:X→Δconv(C)\pi\colon\mathcal{X}\to\Delta^{\rm conv}(\mathbb{C}) be an affine finite-type log-terminal faithfully flat morphism, where Δconv(C)=Spec⁡(C[[t]]conv)\Delta^{\rm conv}(\mathbb{C})=\operatorname{Spec}(\mathbb{C}[[t]]^{\rm conv}) and v(t)=1v(t)=1. Let Xηan\mathcal{X}_\eta^{\rm an} be the Berkovich analytification of the generic fiber, and let B(x∈X)\mathfrak{B}(x\in\mathcal{X}) denote rescaling classes of non-flat bubbles at xx. Deeper-bubble conjecture. There is a bijection

B(x∈X)≃Crit⁡(x∈X)⊂Xηan,\mathfrak{B}(x\in\mathcal{X})\simeq\operatorname{Crit}(x\in\mathcal{X})\subset\mathcal{X}_\eta^{\rm an},

with inverse maps sending a bubble class to its valuation and a valuation to its bubble. The set Crit⁡(x∈X)\operatorname{Crit}(x\in\mathcal{X}) and the bubble moduli space have locally piecewise-linear structure, and both depend only on the germ of π\pi around xx. This predicts that all deeper bubbles, including their algebraic structures and metrics, are encoded by a locally piecewise-linear subset of the non-archimedean analytification and are local in the degeneration germ.

References

Primary source

Yuji Odaka, “Algebraic geometry of bubbling Kahler metrics”, arXiv:2406.14518 (2025).

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