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Let $S$ be a punctured surface of finite type and negative Euler characteristic. We determine all possible representations $\rho:\pi_1(S) \to \text{PSL}_2(\mathbb{C})$ that arise as the monodromy of the Schwarzian equation on $S$ with…

几何拓扑 · 数学 2025-03-19 Gianluca Faraco , Subhojoy Gupta

A meromorphic quadratic differential on a compact Riemann surface defines a complex projective structure away from the poles via the Schwarzian equation. In this article we first prove the analogue of Thurston's Grafting Theorem for the…

几何拓扑 · 数学 2025-11-26 Spandan Ghosh , Subhojoy Gupta

For a punctured surface $S$, we characterize the representations of its fundamental group into $\mathrm{PSL}_2 (\mathbb{C})$ that arise as the monodromy of a meromorphic projective structure on $S$ with poles of order at most two and no…

几何拓扑 · 数学 2021-09-17 Subhojoy Gupta

This paper is devoted to characterizing complex projective structures defined on Riemann surface orbifolds and giving rise to injective developing maps defined on the monodromy covering of the surface (orbifold) in question. The relevance…

动力系统 · 数学 2022-02-14 Ahmed Elshafei , Julio C. Rebelo , Helena Reis

A meromorphic projective structure on a punctured Riemann surface $X\setminus P$ is determined, after fixing a standard projective structure on $X$, by a meromorphic quadratic differential with poles of order three or more at each puncture…

几何拓扑 · 数学 2021-03-04 Subhojoy Gupta , Mahan Mj

We characterize the representations of the fundamental group of a closed surface to $\mathrm{PSL}_2(\mathbb C)$ that arise as the holonomy of a branched complex projective structure with fixed branch divisor. In particular, we compute the…

几何拓扑 · 数学 2021-03-23 Thomas Le Fils

We study projective structures on a surface having poles of prescribed orders. We obtain a monodromy map from a complex manifold parameterising such structures to the stack of framed $\mathrm{PGL}_2(\mathbb{C})$ local systems on the…

几何拓扑 · 数学 2020-07-14 Dylan G. L. Allegretti , Tom Bridgeland

For every integer $g \,\geq\, 2$ 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…

代数几何 · 数学 2021-04-13 Indranil Biswas , Sorin Dumitrescu , Lynn Heller , Sebastian Heller

We consider complex projective structures on Riemann surfaces and their groups of projective automorphisms. We show that the structures achieving the maximal possible number of projective automorphisms allowed by their genus are precisely…

几何拓扑 · 数学 2019-11-14 Gianluca Faraco , Lorenzo Ruffoni

The complex projective structures considered is this article are compact curves locally modeled on $\mathbb{CP}^1$. To such a geometric object, modulo marked isomorphism, the monodromy map associates an algebraic one: a representation of…

微分几何 · 数学 2025-08-28 Titouan Sérandour

The $\text{PSL}(4,\mathbb{R})$ Hitchin component of a closed surface group $\pi_1(S)$ consists of holonomies of properly convex foliated projective structures on the unit tangent bundle of $S$. We prove that the leaves of the…

几何拓扑 · 数学 2023-10-04 Alexander Nolte

Let \theta:\pi_1(R) \to \PSL(2,\C) be a homomorphism of the fundamental group of an oriented, closed surface R of genus exceeding one. We will establish the following theorem. Theorem. Necessary and sufficient for \theta to be the monodromy…

复变函数 · 数学 2009-09-25 Daniel Gallo , Michael Kapovich , Albert Marden

We study a class of continuous deformations of branched complex projective structures on closed surfaces of genus $g\geq 2$, which preserve the holonomy representation of the structure and the order of the branch points. In the case of…

复变函数 · 数学 2021-03-25 Stefano Francaviglia , Lorenzo Ruffoni

We consider translation surfaces with poles on surfaces. We shall prove that any finite group appears as the automorphism group of some translation surface with poles. As a direct consequence we obtain the existence of structures achieving…

几何拓扑 · 数学 2022-07-27 Gianluca Faraco

For a given quasi-Fuchsian representation $\rho:\pi_1(S)\to$ PSL$_2\mathbb{C}$ of the fundamental group of a closed surface $S$ of genus $g\geq 2$, we prove that a generic branched complex projective structure on $S$ with holonomy $\rho$…

几何拓扑 · 数学 2019-11-14 Lorenzo Ruffoni

Let $X$ be an irreducible, reduced complex projective hypersurface of degree $d$. A point $P$ not contained in $X$ is called uniform if the monodromy group of the projection of $X$ from $P$ is isomorphic to the symmetric group $S_d$. We…

代数几何 · 数学 2020-02-25 Maria Gioia Cifani , Alice Cuzzucoli , Riccardo Moschetti

We consider holomorphic foliations by curves on compact complex manifolds, for which we investigate the existence of projective structures along the leaves varying holomorphically (foliated projective structures), that satisfy particular…

复变函数 · 数学 2026-01-13 Bertrand Deroin , Adolfo Guillot

This is a survey of the theory of complex projective (CP^1) structures on compact surfaces. After some preliminary discussion and definitions, we concentrate on three main topics: (1) Using the Schwarzian derivative to parameterize the…

微分几何 · 数学 2009-02-12 David Dumas

We determine the image of the monodromy map for meromorphic projective structures with poles of orders greater than two. This proves the analogue of a theorem of Gallo-Kapovich-Marden, and answers a question of Allegretti and Bridgeland.…

几何拓扑 · 数学 2019-09-23 Subhojoy Gupta , Mahan Mj

We prove that if S is a closed compact surface of negative Euler characteristic, and if R is a quasi-Fuchsian representation in PSL(2,C), then the deformation space M(k,R) of branched projective structures on S with total branching order k…

几何拓扑 · 数学 2014-11-11 Gabriel Calsamiglia , Bertrand Deroin , Stefano Francaviglia
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