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We begin a systematic investigation of derived categories of smooth projective toric varieties defined over an arbitrary base field. We show that, in many cases, toric varieties admit full exceptional collections. Examples include all toric…

Algebraic Geometry · Mathematics 2019-08-14 Matthew R. Ballard , Alexander Duncan , Patrick K. McFaddin

In this paper we study the moduli space of the tropicalizations of Riemann surfaces. We first tropicalize a smooth pointed Riemann surface by a graph defined by its (hyperbolic) pair of pants decomposition. Then we can construct the moduli…

Algebraic Geometry · Mathematics 2020-07-30 Dali Shen

In this paper we study dually flat spaces arising from Delzant polytopes equipped with a symplectic potential together with their corresponding toric K\"ahler manifolds as their torifications.We introduce a dually flat structure and the…

Symplectic Geometry · Mathematics 2023-12-27 Hajime Fujita

We consider the deformation spaces of some singular product-quotient surfaces $X=(C_1 \times C_2)/G$, where the curves $C_i$ have genus 3 and the group $G$ is isomorphic to $\mathbb{Z}_4$. As a by-product, we give a new construction of…

Algebraic Geometry · Mathematics 2018-04-09 Yongnam Lee , Francesco Polizzi

Delzant's theorem for symplectic toric manifolds says that there is a one-to-one correspondence between certain convex polytopes in $\mathbb{R}^n$ and symplectic toric $2n$-manifolds, realized by the image of the moment map. I review proofs…

Symplectic Geometry · Mathematics 2007-05-23 Sam Kaufman

We study genus $g$ coverings of full moduli dimension of degree $d=[\frac {g+3} 2]$. There is a homomorphism between the corresponding Hurwitz space $\H$ of such covers to the moduli space $\M_g$ of genus $g$ curves. In the case $g=3$,…

Algebraic Geometry · Mathematics 2012-09-05 T. Shaska , J. L. Thompson

We describe a period map for those simply connected Enriques surfaces in characteristic 2 whose canonical double cover is K3. The moduli stack for these surfaces has a Deligne-Mumford quotient that is an open substack of a $\mathbb…

Algebraic Geometry · Mathematics 2012-10-02 T. Ekedahl , J. M. E. Hyland , N. I. Shepherd-Barron

We study certain toric Gorenstein varieties with isolated singularities which are the quotient spaces of generic unimodular representations by the one-dimensional torus, or by the product of the one-dimensional torus with a finite abelian…

Algebraic Geometry · Mathematics 2024-11-28 Xiaojun Chen , Leilei Liu , Jieheng Zeng

In the first part of this article we show for some examples of surfaces of general type in toric 3-folds how to construct minimal and canonical models by toric methods explicitly. The examples we study turn out to be surfaces of general…

Algebraic Geometry · Mathematics 2021-12-22 Julius Giesler

Firstly, we see that the bases of the miniversal deformations of isolated $\mathbb{Q}$-Gorenstein toric singularities are quite restricted. In particular, we classify the analytic germs of embedding dimension $\leq 2$ which are the bases of…

Algebraic Geometry · Mathematics 2022-09-13 Andrea Petracci

We study framed translation surfaces corresponding to meromorphic differentials on compact Riemann surfaces, for which a horizontal separatrix is marked for each pole or zero. Such geometric structures naturally appear when studying flat…

Geometric Topology · Mathematics 2020-11-11 Corentin Boissy

Torelli space (in genus g) is the moduli space of compact Riemann surfaces of genus g together with a symplectic basis of their first homology group. It is the quotient of the genus g Teichmuller space by the Torelli group T_g and is a…

Geometric Topology · Mathematics 2007-05-23 Richard Hain

We construct the moduli space for equivalence classes of n-pointed tropical curves of genus g, together with its compactification given by weighted tropical curves, and establish some of its basic topological properties. We compare it to…

Algebraic Geometry · Mathematics 2011-12-23 Lucia Caporaso

We systematically study the moduli theory of symplectic varieties (in the sense of Beauville) which admit a resolution by an irreducible symplectic manifold. In particular, we prove an analog of Verbitsky's global Torelli theorem for the…

Algebraic Geometry · Mathematics 2021-01-07 Benjamin Bakker , Christian Lehn

We give a sufficient condition for the moduli space of quiver representations associated with a dimer model to be smooth for a general stability parameter. We also show that the moduli space in this case is a crepant resolution of the toric…

Algebraic Geometry · Mathematics 2008-09-18 Akira Ishii , Kazushi Ueda

We construct the smooth, compact moduli space of similarity classes of labeled, oriented triangles. The space, denoted $\mathfrak D$, is a connected sum of three projective planes, and projects via blowdown to two shape spaces that have…

Algebraic Geometry · Mathematics 2025-08-01 Eric Brussel , Madeleine Goertz , Elijah Guptill , Kelly Lyle

In this paper, we define two numbers. One comes from counting tropical curves with a stop and the other is the number of holomorphic discs in toric varieties with Lagrangian boundary condition. Both of these curves should satisfy some…

Algebraic Geometry · Mathematics 2007-05-23 Takeo Nishinou

We construct a moduli space for Riemann surfaces that is universal in the sense that it represents compact Riemann surfaces of any finite genus. This moduli space is stratifed according to genus, and it carries a metric and a measure that…

Algebraic Geometry · Mathematics 2017-02-01 Lizhen Ji , Juergen Jost

This note is devoted to the definition of moduli spaces of rational tropical curves with n marked points. We show that this space has a structure of a smooth tropical variety of dimension n-3. We define the Deligne-Mumford compactification…

Algebraic Geometry · Mathematics 2007-05-23 Grigory Mikhalkin

Let X(\Sigma) be a smooth projective toric variety for a complex torus T_\C. In this paper, a real T_\C-invariant Poisson structure \Pi_\Sigma is constructed on the complex manifold X(\Sigma), the symplectic leaves of which are the…

Symplectic Geometry · Mathematics 2009-10-02 Arlo Caine