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Collapsing of K3 Surfaces and Special K\"ahler Structures

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arxiv 2502.18203 v2 pith:3ETQ5CHN submitted 2025-02-25 math.DG math.AG

classification math.DGmath.AG
keywords surfacesahlermathbbcollapsingellipticintegraljacobianmathfrak
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abstract

We study the structure of $\mathfrak{M}_2$, the set of half-dimensional collapsing spaces of hyperk\"ahler metrics on K3 surfaces. We show that $\mathfrak{M}_2$ consists precisely of those underlying metric spaces of integral singular special K\"ahler structures (SKSs) on $ \mathbb{P}^1 $. Furthermore, we establish a bijection between integral singular SKSs on $\mathbb{P}^1 $ and Jacobian elliptic K3 surfaces with a marked holomorphic volume form. Additionally, we compute the number of Jacobian elliptic K3 surfaces that correspond to a given metric on $ \mathbb{P}^1 $.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Compactification of metric moduli space of $K3$ surfaces

    math.DG 2025-12 accept novelty 8.0 of 10

    The Gromov–Hausdorff compactification of unit-diameter hyperkähler K3 metrics is homeomorphic to the adjoint Satake compactification of the K3 period domain.

  2. Ricci-flat metrics on Calabi-Yau manifolds

    math.DG 2025-09 unverdicted novelty 2.0 of 10

    A survey of the degeneration theory of Ricci-flat Kahler metrics on Calabi-Yau manifolds: smooth limits for semiample and nef-and-big classes, path-dependent counterexamples at the boundary, and a list of open conjectures.

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