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Let $C$ be a hyperelliptic curve of genus $g \geq 3$. We give a new description of the theta map for moduli spaces of rank 2 semistable vector bundles with trivial determinant. In orther to do this, we describe a fibration of (a birational…

Algebraic Geometry · Mathematics 2018-02-05 Néstor Fernández Vargas

Let $G$ be a connected compact Lie group and let $\mathbb{G}$ be its complexification. In this paper, we establish a correspondence between the moduli spaces of holomorphic disks bounded by a $G$-invariant Lagrangian submanifold $L…

Symplectic Geometry · Mathematics 2026-05-19 Yoosik Kim

Moduli spaces of quadratic differentials with prescribed singularities are not necessarily connected. We describe here all cases when they have a special hyperelliptic connected component. We announce the general classification theorem: up…

Geometric Topology · Mathematics 2007-05-23 Erwan Lanneau

In the paper, we study the GIT construction of the moduli space of Chow semistable curves of genus 4 in P^3. By using the GIT method developed by Mumford and a deformation theoretic argument, we give a modular description of this moduli…

Algebraic Geometry · Mathematics 2010-08-31 Hosung Kim

For every genus g, we construct a smooth, complete, rational polarized algebraic variety DM_g together with a normal crossing divisor D = sum D_i, such that for every moduli space M_C(2,0) of semistable topologically trivial vector bundles…

Algebraic Geometry · Mathematics 2007-05-23 Andrei Tyurin

We consider the self-dual vortex equations on a positive line bundle L --> M over a compact Kaehler manifold of arbitrary dimension. When M is simply connected, the moduli space of vortex solutions is a projective space. When M is an…

Differential Geometry · Mathematics 2013-08-21 J. M. Baptista

We survey the role played by GIT in the study of moduli spaces, with an emphasis on the birational geometry of GIT quotients.

Algebraic Geometry · Mathematics 2014-03-12 Radu Laza

We discuss selected topics on the topology of moduli spaces of curves and maps, emphasizing their relation with Gromov--Witten theory and integrable systems.

Algebraic Geometry · Mathematics 2008-09-12 Y. -P. Lee , R. Vakil

Recently we suggested a new quantum algebra, the moduli algebra, which was conjectured to be a quantum algebra of observables of the Hamiltonian Chern Simons theory. This algebra provides the quantization of the algebra of functions on the…

q-alg · Mathematics 2008-02-03 A. Yu. Alekseev , V. Schomerus

We study the GIT-quotient of the Cartesian power of projective space modulo the projective orthogonal group. A classical isomorphism of this group with the Inversive group of birational transformations of the projective space of one…

Algebraic Geometry · Mathematics 2014-08-05 Igor Dolgachev , Benjamin Howard

This is the second of a series of two articles in which we provide detailed and self-contained account of the construction of a system of Kuranishi structures on the moduli spaces of pseudo holomorphic disks. Using the notion of obstruction…

Symplectic Geometry · Mathematics 2024-02-16 Kenji Fukaya , Yong-Geun Oh , Hiroshi Ohta , Kaoru Ono

Let $C$ be an algebraic smooth complex curve of genus $g>1$. The object of this paper is the study of the birational structure of certain moduli spaces of vector bundles and of coherent systems on $C$ and the comparison of different type of…

Algebraic Geometry · Mathematics 2011-09-27 Michele Bolognesi , Sonia Brivio

We construct coarse moduli spaces of semiquasihomogeneous hypersurface singularities with respect to right equivalence and contact equivalence. We have to fix the principal part of the semiquasihomogeneous singularities. For the moduli…

alg-geom · Mathematics 2008-02-03 G. -M. Greuel , C. Hertling , G. Pfister

We construct the coarse moduli space $\cM_{qc}(\sigma)$ of quadratic line complexes with a fixed Segre symbol $\sigma$ as well as the moduli space $\cM_{ss}(\sigma)$ of the corresponding singular surfaces. We show that the map associating…

Algebraic Geometry · Mathematics 2007-07-18 D. Avritzer , H. Lange

In this paper we realize the moduli spaces of cubic fourfolds with specified automorphism groups as arithmetic quotients of complex hyperbolic balls or type IV symmetric domains, and study their compactifications. Our results mainly depend…

Algebraic Geometry · Mathematics 2020-11-25 Chenglong Yu , Zhiwei Zheng

Motivated by the relation between (twisted) K3 surfaces and special cubic fourfolds, we construct moduli spaces of polarized twisted K3 surfaces of any fixed degree and order. We do this by mimicking the construction of the moduli space of…

Algebraic Geometry · Mathematics 2019-10-09 Emma Brakkee

Multi-scale differentials were constructed by M.~Bainbridge, D.~Chen, Q.~Gendron, S.~Grushevsky, and M.~M\"oller, from the viewpoint of flat and complex geometry, for the purpose of compactifying moduli spaces of curves together with a…

Algebraic Geometry · Mathematics 2026-05-27 Dawei Chen , Samuel Grushevsky , David Holmes , Martin Möller , Johannes Schmitt

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

Inspired by the log Gromov-Witten (or GW) theory of Gross-Siebert/Abramovich-Chen, we introduce a geometric notion of log J-holomorphic curve relative to a simple normal crossings symplectic divisor defined in [FMZ1]. Every such moduli…

Symplectic Geometry · Mathematics 2022-08-17 Mohammad Farajzadeh-Tehrani

We describe some results on moduli space of logarithmic connections equipped with framings on a $n$-pointed compact Riemann surface.

Algebraic Geometry · Mathematics 2021-03-24 Indranil Biswas , Michi-aki Inaba , Arata Komyo , Masa-Hiko Saito
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