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This paper investigates the relationship between the hyperbolicity of complex quasi-projective varieties $X$ and the (topological) fundamental group $\pi_1(X)$ in the presence of a linear representation $\varrho: \pi_1(X) \to {\rm…

Algebraic Geometry · Mathematics 2024-03-04 Benoit Cadorel , Ya Deng , Katsutoshi Yamanoi

This is Part II of a series of three papers. We studies the hyperbolicity of complex quasi-projective varieties $X$ in the presence of a big and reductive representation $\varrho: \pi_1(X)\to {\rm GL}_N(\mathbb{C})$. For any Galois…

Algebraic Geometry · Mathematics 2025-12-18 Benoit Cadorel , Ya Deng , Katsutoshi Yamanoi

This paper is Part III of a series of three. We begin by introducing the notion of $h$-special varieties, which can be seen as varieties "chain-connected by the Zariski closures of entire curves." We prove that if $X$ is either a special…

Algebraic Geometry · Mathematics 2025-12-24 Benoit Cadorel , Ya Deng , Katsutoshi Yamanoi

Let $X$ be an algebraic variety over $\mathbb{C}$. We say that $X$ is Borel hyperbolic if, for every finite type reduced scheme $S$ over $\mathbb{C}$, every holomorphic map $S^{an}\to X^{an}$ is algebraic. We use a transcendental…

Algebraic Geometry · Mathematics 2018-06-26 Ariyan Javanpeykar , Robert A. Kucharczyk

Looking at the finite \'etale congruence covers $X(p)$ of a complex algebraic variety $X$ equipped with a variation of integral polarized Hodge structures whose period map is quasi-finite, we show that both the minimal gonality among all…

Algebraic Geometry · Mathematics 2020-07-28 Yohan Brunebarbe

Given a complex projective algebraic variety $X$ we define $ h(X)$ as the largest $n$ such that the $n$-th symmetric power of $X$ is (Brody) hyperbolic. Using Nevanlinna theory for algebroid maps, we give non-trivial lower bounds for $…

Algebraic Geometry · Mathematics 2024-06-04 Natalia Garcia-Fritz , Hector Pasten

In this paper we prove that every quasi-projective base space $V$ of smooth family of minimal projective manifolds with maximal variation is pseudo Kobayashi hyperbolic, i.e. $V$ is Kobayashi hyperbolic modulo a proper subvariety…

Algebraic Geometry · Mathematics 2018-09-26 Ya Deng

Hyperbolic homogeneous polynomials with real coefficients, i.e., hyperbolic real projective hypersurfaces, and their determinantal representations, play a key role in the emerging field of convex algebraic geometry. In this paper we…

Algebraic Geometry · Mathematics 2018-03-12 Eli Shamovich , Victor Vinnikov

Given a non-positively curved cube complex $X$, we prove that the quotient of $\pi_1X$ defined by a cubical presentation $\langle X\mid Y_1,\dots, Y_s\rangle$ satisfying sufficient non-metric cubical small-cancellation conditions is…

Group Theory · Mathematics 2024-03-04 Macarena Arenas , Kasia Jankiewicz , Daniel T. Wise

Given a complex quasi-projective normal variety $X$ and a linear representation $\varrho:\pi_1(X)\to {\rm GL}_{N}(K)$ with $K$ any field of positive characteristic, we mainly establish the following results: 1. the construction of the…

Algebraic Geometry · Mathematics 2025-10-10 Ya Deng , Katsutoshi Yamanoi

Let X be a normal connected complex algebraic variety equipped with a semisimple complex representation of its fundamental group. Then, under a maximality assumption, we prove that the covering space of X associated to the kernel of the…

Algebraic Geometry · Mathematics 2023-05-18 Yohan Brunebarbe

The Green-Griffiths-Lang conjecture stipulates that for every projective variety $X$ of general type over ${\mathbb C}$, there exists a proper algebraic subvariety of $X$ containing all non constant entire curves $f:{\mathbb C}\to X$. Using…

Algebraic Geometry · Mathematics 2015-03-13 Jean-Pierre Demailly

We prove that the projective complex algebraic varieties admitting a large complex local system satisfy a strong version of the Green-Griffiths-Lang conjecture.

Algebraic Geometry · Mathematics 2025-12-22 Yohan Brunebarbe

Let $N$ be a manifold of dimension $m$ with a flat vector bundle given by a representation $\rho:\pi_1(N) \rightarrow \mathrm{GL}(n, \mathbf{R})$ where $\pi_1(N)$ is finitely generated. The holonomy group $\rho$ is a $k$-partially…

Geometric Topology · Mathematics 2026-02-17 Suhyoung Choi

We relate the geometry of curves to the notion of hyperbolicity in real algebraic geometry. A hyperbolic variety is a real algebraic variety that (in particular) admits a real fibered morphism to a projective space whose dimension is equal…

Algebraic Geometry · Mathematics 2022-10-04 Mario Kummer , Rainer Sinn

We present a new criterion for the complex hyperbolicity of a non-compact quotient X of a bounded symmetric domain. For each p $\ge$ 1, this criterion gives a precise condition under which the subvarieties V $\subset$ X with dim V $\ge$ p…

Algebraic Geometry · Mathematics 2018-10-01 Benoit Cadorel

Inspired by the work of Cherry, we introduce and study a new notion of Brody hyperbolicity for rigid analytic varieties over a non-archimedean field $K$ of characteristic zero. We use this notion of hyperbolicity to show the following…

Algebraic Geometry · Mathematics 2022-08-09 Ariyan Javanpeykar , Alberto Vezzani

Let $K$ be an algebraically closed, complete, non-Archimedean valued field of characteristic zero. We prove the non-Archimedean Green--Griffiths--Lang conjecture for projective surfaces of irregularity one. More precisely, we prove that if…

Algebraic Geometry · Mathematics 2025-02-18 Jackson S. Morrow

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 prove that quasi-projective base spaces of smooth families of minimal varieties of general type with maximal variation do not admit Zariski dense entire curves. We deduce the fact that moduli stacks of polarized varieties of this sort…

Algebraic Geometry · Mathematics 2019-12-11 Mihnea Popa , Behrouz Taji , Lei Wu
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