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We continue our study on smooth complex projective varieties $X$ of maximal Albanese dimension and of general type satisfying $\chi(X, \omega_X)=0$. We formulate a conjectural characterization of such varieties and prove this conjecture…

Algebraic Geometry · Mathematics 2013-11-19 Jungkai A. Chen , Zhi Jiang

We show that a smooth proper weakly ordinary variety $X$ of maximal Albanese dimension satisfies $\chi(X, \omega_X) \geq 0$. We also show that if $X$ is not of general type, then $\chi(X, \omega_X) = 0$ and the Albanese image of $X$ is…

Algebraic Geometry · Mathematics 2025-07-03 Jefferson Baudin

We prove that every smooth projective variety with maximal Albanese dimension has a good minimal model. We also treat Ueno's problem on subvarieties of Abelian varieties.

Algebraic Geometry · Mathematics 2009-11-17 Osamu Fujino

We study products of irreducible theta divisors from two points of view. On the one hand, we characterize them as normal subvarieties of abelian varieties such that a desingularization has holomorphic Euler characteristic 1. On the other…

Algebraic Geometry · Mathematics 2014-07-09 Zhi Jiang , Martí Lahoz , Sofia Tirabassi

The purpose of this paper is to show how the generic vanishing theorems of M. Green and the second author can be used to settle several questions and conjectures concerning the geometry of irregular complex projective varieties. First, we…

alg-geom · Mathematics 2008-02-03 Lawrence Ein , Robert Lazarsfeld

A result of Popa and Schnell shows that any holomorphic 1-form on a smooth complex projective variety of general type admits zeros. More generally, given a variety $X$ which admits $g$ pointwise linearly independent holomorphic 1-forms,…

Algebraic Geometry · Mathematics 2023-08-30 Nathan Chen , Benjamin Church , Feng Hao

Let $X$ be a minimal projective threefold of general type over $\mathbb{C}$ with only Gorenstein quotient singularities, and let $\mathrm{Aut}_{\mathbb{Q}}(X)$ be the subgroup of automorphisms acting trivially on $H^*(X,\mathbb{Q})$. In…

Algebraic Geometry · Mathematics 2022-06-10 Hang Zhao

We study the birational geometry of varieties of maximal Albanese dimension. In particular we discuss criteria for a generically finite morphism of varieties of maximal Albanese dimension to be birational; we give a new characterization of…

Algebraic Geometry · Mathematics 2007-05-23 C. D. Hacon , R. Pardini

Call a normal complex projective variety $X$ Koll\'ar-hyperbolic if any nonconstant map from a smooth projective curve to $X$ induces a nontrivial homomorphism of \'etale fundamental groups. Examples include (a) smooth varieties with finite…

Algebraic Geometry · Mathematics 2025-09-08 Donu Arapura

Since Poonen's construction of a variety $X$ defined over a number field $k$ for which $X(k)$ is empty and the \'etale Brauer--Manin set $X(\mathbf{A}_k)^\text{Br,et}$ is not, several other examples of smooth, projective varieties have been…

Number Theory · Mathematics 2015-12-09 Arne Smeets

Let $X$ be a smooth projective variety with a nef anticanonical divisor over an algebraically closed field of characteristic $p>0$. In this paper, we establish a precise structure of $X$ under the condition that $a_X: X \to {\rm Alb}(X)$ is…

Algebraic Geometry · Mathematics 2025-10-21 Tongji Gao , Zhan Li , Lei Zhang

In this short article we show that if $(X, B)$ is a compact K\"ahler klt pair of maximal Albanese dimension, then it has a good minimal model, i.e. there is a bimeromorphic contraction $\phi:X\dashrightarrow X'$ such that $K_{X'}+B'$ is…

Algebraic Geometry · Mathematics 2022-08-04 Omprokash Das , Christopher Hacon

We prove that any smooth complex projective variety with generic vanishing index bigger or equal than 2 has birational bicanonical map. Therefore, if X is a smooth complex projective variety X with maximal Albanese dimension and…

Algebraic Geometry · Mathematics 2011-11-29 Martí Lahoz

Let X be a projective variety, possibly singular. A generalized Albanese variety of X was constructed by Esnault, Srinivas and Viehweg over algebraically closed base field as a universal regular quotient of the relative Chow group of…

Algebraic Geometry · Mathematics 2011-02-14 Henrik Russell

We explicitly describe the Albanese morphism of a hyperelliptic variety, i.e., the quotient $X$ of an abelian variety $A$ by a finite group $G$ acting freely and not only by translations, by giving a description of the Albanese variety and…

Algebraic Geometry · Mathematics 2024-11-25 Pieter Belmans , Andreas Demleitner , Pedro Núñez

We coin the term \emph{$T$-trivial varieties} to denote smooth proper schemes over ground fields $k$ whose tangent sheaf is free. Over the complex numbers, this are precisely the abelian varieties. However, Igusa observed that in…

Algebraic Geometry · Mathematics 2025-04-30 Damian Rössler , Stefan Schröer

It has been conjectured that varieties of general type do not admit nowhere vanishing holomorphic one-forms. We confirm this conjecture for smooth minimal varieties and for varieties whose Albanese variety is simple.

Algebraic Geometry · Mathematics 2007-05-23 Christopher D. Hacon , Sándor J. Kovács

We classify almost homogeneous normal varieties of Albanese codimension $1$, defined over an arbitrary field. We prove that such a variety has a unique normal equivariant completion. Over a perfect field, the group scheme of automorphisms…

Algebraic Geometry · Mathematics 2020-03-20 Bruno Laurent

I prove that for any complex projective variety $X$ and a sufficiently large integer $N$ all the fibers of Albanese map of the $N$-th configuration space of $X$ are dominated by smooth connected projective varieties with vanishing ${\rm…

alg-geom · Mathematics 2008-02-03 M. Rovinsky

We show that if $X$ is a normal complex quasi-projective variety, the quasi-Albanese map of which is proper, then the torsionfree nilpotent quotients of $\pi_1(X)$ are, up to a controlled finite index, the same ones as those of the…

Algebraic Geometry · Mathematics 2023-04-21 Rodolfo Aguilar Aguilar , Frédéric Campana
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