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We establish normal form theorems for a large class of singular flat connections on complex manifolds, including connections with logarithmic poles along weighted homogeneous Saito free divisors. As a result, we show that the moduli spaces…

Algebraic Geometry · Mathematics 2022-09-02 Francis Bischoff

We study the moduli space of stable sheaves of Euler characteristic 1, supported on curves of arithmetic genus 2 contained in a smooth quadric surface. We show that this moduli space is rational. We give a classification of the stable…

Algebraic Geometry · Mathematics 2017-01-31 Mario Maican

Twisted modules over vertex algebras formalize the relations among twisted vertex operators and have applications to conformal field theory and representation theory. A recent generalization, called twisted logarithmic module, involves the…

Quantum Algebra · Mathematics 2024-01-03 Bojko Bakalov , McKay Sullivan

We construct families of quilted surfaces parametrized by the multiplihedra, and define moduli spaces of pseudoholomorphic quilted disks using the theory of pseudoholomorphic quilts of Wehrheim and Woodward. We prove a gluing theorem for…

Symplectic Geometry · Mathematics 2009-09-21 Sikimeti Ma'u

Maulik and Ranganathan have recently introduced moduli spaces of logarithmic stable pairs. We examine the theory in the case of toric surfaces, and recast the theory in this case using three ingredients: Gelfand, Kapranov and Zelevinsky…

Algebraic Geometry · Mathematics 2023-02-17 Patrick Kennedy-Hunt

We construct a smooth algebraic stack of tuples consisting of genus two nodal curves, simple effective divisors away from the nodes, and twisted fields. It provides a desingularization of the moduli of genus two stable maps to projective…

Algebraic Geometry · Mathematics 2025-09-08 Yi Hu , Jingchen Niu

For any non-simply laced Lie group $G$ and elliptic curve $\Sigma$, we show that the moduli space of flat $G$ bundles over $\Sigma$ can be identified with the moduli space of rational surfaces with $G$-configurations which contain $\Sigma$…

Algebraic Geometry · Mathematics 2009-08-13 Naichung Conan Leung , Jiajin Zhang

A Fuchsian group $\Gamma$ has a modular embedding if its adjoint trace field is a totally real number field and every unbounded Galois conjugate $\Gamma^\sigma$ comes equipped with a holomorphic (or conjugate holomorphic) map ${\phi^\sigma…

Geometric Topology · Mathematics 2026-01-14 Matthew Stover

A lot is known about the moduli space of parabolic bundles over curves of genus $g\geq 2$, but the lower genus cases are notably different. The goal of this article is to study the geometry of the moduli space of semistable parabolic…

Algebraic Geometry · Mathematics 2026-05-26 Roberto Alvarenga , Inder Kaur , Frank Loray

We construct helicoid-like embedded minimal disks with axes along self-similar curves modeled on logarithmic spirals. The surfaces have a self-similarity inherited from the curves and the nature of the construction. Moreover, inside of a…

Differential Geometry · Mathematics 2014-04-30 Christine Breiner , Stephen J. Kleene

This paper constructs a Kuranishi structure for the moduli stack of holomorphic curves in exploded manifolds. To avoid some technicalities of abstract Kuranishi structures, we embed our Kuranishi structure inside an ambient moduli stack of…

Symplectic Geometry · Mathematics 2025-09-10 Brett Parker

We investigate the moduli space ${\mathcal P}_g$ of smooth complex projective curves of genus $g$ equipped with a projective structure. When $g\, \geq\, 3$, it is shown that this moduli space ${\mathcal P}_g$ does not admit any nonconstant…

Algebraic Geometry · Mathematics 2023-09-07 Indranil Biswas

We show the compactly supported motive of the moduli stack of degree $n$ rational curves on the weighted projective stack $\mathcal{P}(a,b)$ is of mixed Tate type over any base field $K$ with $\text{char}(K) \nmid a,b$ and has class…

Algebraic Geometry · Mathematics 2021-01-12 Jun-Yong Park , Hunter Spink

Given a smooth, projective curve $Y$, a finite group $G$ and a positive integer $n$ we study smooth, proper families $X\to Y\times S\to S$ of Galois covers of $Y$ with Galois group isomorphic to $G$ branched in $n$ points, parameterized by…

Algebraic Geometry · Mathematics 2024-05-14 Vassil Kanev

This article generalizes the operad of moduli spaces of curves to SUSY curves. SUSY curves are algebraic curves with additional supersymmetric or supergeometric structure. Here, we focus on the description of the relevant category of graphs…

Algebraic Geometry · Mathematics 2022-09-13 Enno Keßler , Yuri I. Manin , Yingying Wu

We give a canonical procedure associating to an algebraic number a first a hyperelliptic curve C_a, and then a triangle curve (D_a, G_a) obtained through the normal closure of an associated Belyi function. In this way we show that the…

Algebraic Geometry · Mathematics 2013-03-12 Ingrid Bauer , Fabrizio Catanese , Fritz Grunewald

In this paper, we provide an upgrade of Deligne's geometric class field theory for tamely ramified Galois groups using logarithmic geometry. In particular, we define a framed logarithmic Picard space, and show that a logarithmic…

Algebraic Geometry · Mathematics 2025-08-13 Aaron Slipper

We propose an explicit relation between the cohomology of compactified and noncompactified moduli spaces of algebraic curves with punctures. This relationship generalizes one between commutative algebras and Lie algebras proposed by Lazard,…

alg-geom · Mathematics 2008-02-03 Takashi Kimura , Jim Stasheff , Alexander A. Voronov

Inspired by constructions over the complex numbers of Dolgachev and Alexeev-Engel, we define moduli stacks $\mathcal{M}_{(L,\mathcal{A})/\mathbb{Z}}$ of lattice-polarized K3 surfaces over arbitrary bases, paying particular attention to the…

Algebraic Geometry · Mathematics 2025-10-14 Danny Bragg , Emma Brakkee , Anthony Várilly-Alvarado

Fuchsian groups with a modular embedding have the richest arithmetic properties among non-arithmetic Fuchsian groups. But they are very rare, all known examples being related either to triangle groups or to Teichmueller curves. In Part I of…

Number Theory · Mathematics 2019-02-20 Martin Moeller , Don Zagier