Birational description of moduli spaces of rank 2 logarithmic connections

In this paper, we provide an explicit description of the Zariski-open subset of the moduli space of rank 2 parabolic logarithmic connections in the case g≥2. Our approach is to analyze the underlying parabolic bundles and the apparent singularities of the parabolic connections. We prove that a Zariski-open subset of the product of a projective space and the moduli space of parabolic bundles give a Darboux coordinate for the moduli space of parabolic connections.

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Publication Details

Journal
Kyoto journal of mathematics
Published
2025-01-01
DOI
https://doi.org/10.1215/21562261-2024-0031
Primary Topic
Algebraic Geometry and Number Theory
Type
article
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article

Birational description of moduli spaces of rank 2 logarithmic connections

Takafumi Matsumoto
Kyoto journal of mathematics
Algebraic Geometry and Number Theory
article

Birational description of moduli spaces of rank 2 logarithmic connections

Takafumi Matsumoto
article en

Abstract

In this paper, we provide an explicit description of the Zariski-open subset of the moduli space of rank 2 parabolic logarithmic connections in the case g≥2. Our approach is to analyze the underlying parabolic bundles and the apparent singularities of the parabolic connections. We prove that a Zariski-open subset of the product of a projective space and the moduli space of parabolic bundles give a Darboux coordinate for the moduli space of parabolic connections.

Kyoto journal of mathematicsVol. -1(-1)
Kobe University (JP)
Openalex Percentile: Top 72%
Algebraic Geometry and Number Theory
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Birational description of moduli spaces of rank 2 logarithmic connections — Takafumi Matsumoto · Kyoto journal of mathematics (2025) | TGRS Research Map | TGRS