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Asymptotic Geometry of the Moduli Space of Rank Two Irregular Higgs Bundles over the Projective Line

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arxiv 2206.11883 v3 pith:JSX3AEV3 submitted 2022-06-23 math.DG

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abstract

We study the asymptotic behavior of Hitchin's hyperk\"ahler metric on the moduli space of rank two irregular Higgs bundles over $\mathbb{C}P^1$. Along a generic curve, we prove that the Hitchin metric is asymptotic to the semiflat metric at an arbitrary polynomial order. When there are no weakly parabolic singularities, the rate is exponential. In the case of four-dimensional moduli spaces, we prove that the semiflat metric is asymptotic to an ALG/ALG$^\ast$ model metric.

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  1. The asymptotics of the $\mathrm{SL}_2(\mathbb{C})$-Hitchin metric on the singular locus: subintegrable systems

    math.DG 2025-06 conditional novelty 6.0 of 10

    For locally fiducial SL(2,C)-Higgs bundles over singular spectral curves, Hitchin equation solutions and the restricted Hitchin metric converge exponentially to semi-flat data along the large-Higgs-field ray.

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