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We give an elementary explicit construction of cell decomposition of the moduli space of projective structures on a two dimensional surface analogous to the decomposition of Penner/Strebel for moduli space of complex structures. The…

High Energy Physics - Theory · Physics 2008-02-03 V. V. Fock

Consider a smooth projective family of complex polarized manifolds with semi-ample canonical sheaf over a quasi-projective manifold $V$. When the associated moduli map $V\to P_h$ from the base to coarse moduli space is quasi-finite, we…

Algebraic Geometry · Mathematics 2019-12-25 Ya Deng

The moduli space of jets of certain G-structures (basically those which admit a canonical linear connection) is shown to be isomorphic to the quotient of a natural G-module by G.

Differential Geometry · Mathematics 2016-09-07 C. Martinez Ontalba , J. Munoz Masque , A. Valdes

We construct explicitly a finite cover of the moduli stack of compact Riemann surfaces with a given group of symmetries by a smooth quasi-projective variety.

Algebraic Geometry · Mathematics 2021-04-06 Fabio Perroni

We define convex projective structures on 2D surfaces with holes and investigate their moduli space. We prove that this moduli space is canonically identified with the higher Teichmuller space for the group PSL_3 defined in our paper…

Differential Geometry · Mathematics 2007-05-23 V. V. Fock , A. B. Goncharov

We prove the existence of quasi-projective coarse moduli spaces parametrising certain complete flags of subschemes of a fixed projective space $\mathbb{P}(V)$ up to projective automorphisms. The flags of subschemes being parametrised are…

Algebraic Geometry · Mathematics 2024-10-08 George Cooper

We define complete stable pairs on a smooth projective variety, and construct their moduli space. These moduli spaces have natural morphisms to the moduli of stable pairs and Quot-schemes. As an example, we show that the moduli of complete…

Algebraic Geometry · Mathematics 2025-12-10 Baosen Wu

We give a characterizaton of smooth ample Hypersurfaces in Abelian Varieties and also describe an irreducible connected component of their moduli space: it consists of the Hypersurfaces of a given polarization type, plus the iterated…

Algebraic Geometry · Mathematics 2020-02-05 Fabrizio Catanese , Yongnam Lee

In this paper we characterize smooth complex projective varieties that admit a quadric bundle structure on some dense open subset in terms of the geometry of certain families of rational curves.

Algebraic Geometry · Mathematics 2008-11-07 Carolina Araujo

Consider a Kleinian singularity $ \mathbb{C}^2/\Gamma $, where $ \Gamma $ is a finite subgroup of $ SL_2(\mathbb{C}) $. In this paper, we construct moduli spaces of framed sheaves on a projective Deligne-Mumford stack compactifying the…

Algebraic Geometry · Mathematics 2024-03-13 Søren Gammelgaard

Several uniqueness results on compact maximal hypersurfaces in a wide class of sta- bly causal spacetimes are given. They are obtained from the study of a distinguished function on the maximal hypersurface, under suitable natural first…

Differential Geometry · Mathematics 2016-09-15 Rafael M. Rubio , Juan J. Salamanca

We prove the existence of fine moduli spaces of simple coherent sheaves on families of irreducible curves. Our proof is based on the existence of a universal upper bound of the Castelnuovo-Mumford regularity of such sheaves, which we…

Algebraic Geometry · Mathematics 2013-05-03 Igor Burban , Bernd Kreussler

The moduli spaces of stable surfaces serve as compactifications of the moduli spaces of canonical models of smooth surfaces in the same way the moduli spaces of stable curves compactify the moduli spaces of smooth curves. However, the…

Algebraic Geometry · Mathematics 2007-05-23 Michael A. van Opstall

We introduce the notion of stable orbifold projective curves, and show that the moduli stack of stable orbifold projective curves is isomorphic to the moduli stack of weighted pointed stable curves in the sense of Hassett with respect to…

Algebraic Geometry · Mathematics 2024-01-29 Tarig Abdelgadir , Daniel Chan , Shinnosuke Okawa , Kazushi Ueda

Consider the moduli functor of canonically polarized complex manifolds with Hilbert polynomial h, and let M_h be the corresponding coarse quasi-projective moduli scheme. We show that M_h is Brody hyperbolic in the following sense: Assume…

Algebraic Geometry · Mathematics 2007-05-23 Eckart Viehweg , Kang Zuo

We introduce and analyze a new geometric structure on topological surfaces generalizing the complex structure. To define this so called higher complex structure we use the punctual Hilbert scheme of the plane. The moduli space of higher…

Differential Geometry · Mathematics 2025-07-08 Vladimir V. Fock , Alexander Thomas

We give an explicit simple construction for classifying spaces of maps obtained as hyperplane projections of immersions. We prove structure theorems for these classifying spaces.

Geometric Topology · Mathematics 2019-02-27 András Szűcs , Tamás Terpai

We construct a compact convex generating set $\mathcal{C}_n$ of the moduli set of closed connected projective special real manifolds of fixed dimension $n$. We show that a closed connected projective special real manifold corresponds to an…

Differential Geometry · Mathematics 2019-07-17 David Lindemann

We describe the K-moduli spaces of weighted hypersurfaces of degree $2(n+3)$ in $\mathbb{P}(1,2,n+2,n+3)$. We show that the K-polystable limits of these weighted hypersurfaces are also weighted hypersurfaces of the same degree in the same…

Algebraic Geometry · Mathematics 2026-05-01 In-Kyun Kim , Yuchen Liu , Chengxi Wang

These notes grew out of our learning and applying the methods of Fock and Goncharov concerning moduli spaces of real projective structures on surfaces with ideal triangulations. We give a self-contained treatment of Fock and Goncharov's…

Geometric Topology · Mathematics 2018-01-12 Alex Casella , Dominic Tate , Stephan Tillmann