Holomorphic $\mathfrak{sl}(2,\mathbb{C})$-systems with Fuchsian monodromy (with an appendix by Takuro Mochizuki)
Annales Henri Lebesgue, Volume 8 (2025), pp. 589-634

Metadata

Keywords Fuchsian representation, holomorphic connection, parabolic bundle, abelianization, WKB analysis

Abstract

For every integer $g \ge 2$ we show the existence of a compact Riemann surface $\Sigma $ of genus $g$ such that the rank two trivial holomorphic vector bundle $\mathcal{O}^{\oplus 2}_{\Sigma }$ admits holomorphic connections with $\operatorname{SL}(2,\mathbb{R})$ monodromy and maximal Euler class. Such a monodromy representation is known to coincide with the Fuchsian uniformizing representation for some Riemann surface of genus $g$. This also answers a question of Calsamiglia, Deroin, Heu and Loray. The construction carries over to all very stable and compatible real holomorphic structures over the topologically trivial rank two bundle on $\Sigma $, and gives the existence of holomorphic connections with Fuchsian monodromy in these cases as well.


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