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This article is concerned with moduli spaces of connections on bundles on Riemann surfaces, where the structure group of the bundle may vary in different regions of the surface. Here we will describe such moduli spaces as complex symplectic…

Algebraic Geometry · Mathematics 2013-06-05 Philip Boalch

By modifying Cole's example, we construct explicit Riemann surfaces with large bounds on corona solutions in an elementary way.

Complex Variables · Mathematics 2014-12-15 Byung-Geun Oh

It is proved that the number of deformation types of complex structures on a fixed oriented smooth four-manifold can be arbitrarily large. The considered examples are locally simple abelian covers of rational surfaces.

Algebraic Geometry · Mathematics 2015-06-26 Marco Manetti

The moduli associated with boundaries in a Riemann surface are parametrized by the positions and strengths of electric charges. This suggests a method for summing over orientable Riemann surfaces with Dirichlet boundary conditions on the…

High Energy Physics - Theory · Physics 2009-10-09 Michael B. Green , Joe Polchinski

We investigate non-homeomorphic mappings of Riemannian surfaces of Sobolev class. We have obtained some estimates of distortion of moduli of families of curves. We have proved that, under some conditions, these mappings have a continuous…

Complex Variables · Mathematics 2022-09-27 Evgeny Sevost'yanov , Oleksandr Dovhopiatyi , Nataliya Ilkevych , Vitalina Kalenska

We give some concrete examples of moduli spaces of connections. Precisely, we explain how to explicitly construct the moduli spaces of rank 2 fuchsian systems and logarithmic connections on the Riemann sphere with 4 poles. The former ones…

Classical Analysis and ODEs · Mathematics 2015-03-24 Frank Loray

We construct moduli stacks of wild Riemann surfaces in the (pure) untwisted case, for any complex reductive structure group, and we define the corresponding (pure) wild mapping class groups.

Algebraic Geometry · Mathematics 2025-11-18 Jean Douçot , Gabriele Rembado , Matteo Tamiozzo

We describe several explicit examples of simple abelian surfaces over real quadratic fields with real multiplication and everywhere good reduction. These examples provide evidence for the Eichler-Shimura conjecture for Hilbert modular forms…

Number Theory · Mathematics 2017-07-03 Lassina Dembele , Abhinav Kumar

We survey Mirzakhani's work relating to Riemann surfaces, which spans about 20 papers. We target the discussion at a broad audience of non-experts.

Dynamical Systems · Mathematics 2020-02-12 Alex Wright

In this paper we investigate the cohomological obstruction for the field of moduli of a $G$-cover to be a field of definition, in the case of local fields and covers with tame admissible reduction. This applies in particular to $p$-adic…

Algebraic Geometry · Mathematics 2009-09-25 Stefan Wewers

We show that abelian surfaces (and consequently curves of genus 2) over totally real fields are potentially modular. As a consequence, we obtain the expected meromorphic continuation and functional equations of their Hasse--Weil zeta…

Number Theory · Mathematics 2021-11-30 George Boxer , Frank Calegari , Toby Gee , Vincent Pilloni

We apply the supergeometric analogue of Artin's algebraicity criteria to prove algebraicity for four moduli problems in supergeometry: supercurves, super Riemann surfaces, stable supercurves, and stable super Riemann surfaces. The…

Algebraic Geometry · Mathematics 2026-03-18 Nadia Ott

Let $K$ be an imaginary quadratic field. Modular forms for GL(2) over $K$ are known as Bianchi modular forms. Standard modularity conjectures assert that every weight 2 rational Bianchi newform has either an associated elliptic curve over…

Number Theory · Mathematics 2019-01-16 Ciaran Schembri

Let $X$ be a smooth projective algebraic curve of genus $g\geq 2$ defined over a field $K$. We show that $X$ can be defined over its field of moduli if it has odd signature, i.e. if the signature of the covering $X\to X/\Aut(X)$ is of type…

Algebraic Geometry · Mathematics 2012-07-06 Michela Artebani , Saúl Quispe

This is an informal set of lecture notes on moduli spaces of curves based on a set of lectures given at the ICTP last summer. It begins at an elementary level and discusses the genus 1 case in detail. The notes then give an informal…

Algebraic Geometry · Mathematics 2007-05-23 Richard Hain

In this paper we study the smooth moduli space of closed Riemann surfaces. This smooth moduli is an infinite cover of the usual moduli space $\mathscr{M}_g$ of closed Riemann surfaces, and is identified with the Schottky space of rank $g.$…

Geometric Topology · Mathematics 2016-11-17 Yong Hou

We prove the existence of a one parameter family of minimal embedded hypersurfaces in $R^{n+1}$, for $n \geq 3$, which generalize the well known 2 dimensional "Riemann minimal surfaces". The hypersurfaces we obtain are complete, embedded,…

Differential Geometry · Mathematics 2007-05-23 S. Kaabachi , F. Pacard

In 1962 E. H. Rauch established the existence of points in the moduli space of Riemann surfaces not having a neighbourhood homeomorphic to a ball. These points are called here topologically singular. We give a different proof of the results…

Algebraic Geometry · Mathematics 2018-11-28 Antonio F. Costa , Ana M. Porto

We give infinite series of groups Gamma and of compact complex surfaces of general type S with fundamental group Gamma such that 1) Any surface S' with the same Euler number as S, and fundamental group Gamma, is diffeomorphic to S. 2) The…

Algebraic Geometry · Mathematics 2007-05-23 Fabrizio Catanese

Let S be a surface obtained from a plane polygon by identifying infinitely many pairs of segments along its boundary. A condition is given under which the complex structure in the interior of the polygon extends uniquely across the quotient…

Complex Variables · Mathematics 2014-02-26 André de Carvalho , Toby Hall