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The lack of a uniformization theorem in several complex variables leads to a desire to classify all of the simply connected domains. We use established computational methods and a localization technique to generalize a recently-published…

Complex Variables · Mathematics 2026-01-07 Nicholas Newsome

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

A projective manifold $M$ is algebraically hyperbolic if there exists a positive constant $A$ such that the degree of any curve of genus $g$ on $M$ is bounded from above by $A(g-1)$. A classical result is that Kobayashi hyperbolicity…

Algebraic Geometry · Mathematics 2021-09-20 Fedor Bogomolov , Ljudmila Kamenova , Misha Verbitsky

For smooth families with maximal variation, whose general fibers have semi-ample canonical bundle, the generalized Viehweg hyperbolicity conjecture states that the base spaces of such families are of log general type. This deep conjecture…

Algebraic Geometry · Mathematics 2020-05-01 Ya Deng , with an appendix by Dan Abramovich

Let X be a projective variety which is algebraic Lang hyperbolic. We show that Lang's conjecture holds (one direction only): X and all its subvarieties are of general type and the canonical divisor K_X is ample at smooth points and Kawamata…

Algebraic Geometry · Mathematics 2019-07-08 Fei Hu , Sheng Meng , De-Qi Zhang

We give two new elementary proofs of the complete Kobayashi hyperbolicity of the twice-punctured complex plane. We also present an extremely short proof that bounded domains are complete Kobayashi hyperbolic. Our proofs rely neither on the…

Complex Variables · Mathematics 2026-04-22 Bharathi Thiruvengadam , Jaikrishnan Janardhanan

In this paper, we prove that in any projective manifold, the complements of general hypersurfaces of sufficiently large degree are Kobayashi hyperbolic. We also provide an effective lower bound on the degree. This confirms a conjecture by…

Algebraic Geometry · Mathematics 2019-04-01 Damian Brotbek , Ya Deng

In this paper, we give sufficient conditions for Cauchy-completeness of Kobayashi hyperbolic domains in complex manifolds. The first result gives a sufficient condition for completeness for relatively compact domains in several large…

Complex Variables · Mathematics 2025-04-11 Rumpa Masanta

Projective varieties with ample cotangent bundle satisfy many notions of hyperbolicity, and one goal of this paper is to discuss generalizations to quasi-projective varieties. A major hurdle is that the naive generalization fails, i.e. the…

Algebraic Geometry · Mathematics 2020-08-19 Kenneth Ascher , Kristin DeVleming , Amos Turchet

We first give a sufficient condition, issued from pluripotential theory, for an unbounded domain in the complex Euclidean space $\mathbb C^n$ to be Kobayashi hyperbolic. Then, we construct an example of a rigid pseudoconvex domain in…

Complex Variables · Mathematics 2020-05-08 Hervé Gaussier , Nikolay Shcherbina

We construct an unbounded strictly pseudoconvex Kobayashi hyperbolic and complete domain in $\mathbb{C}^2$, which also possesses complete Bergman metric, but has no nonconstant bounded holomorphic functions.

Complex Variables · Mathematics 2020-03-17 Nikolay Shcherbina , Liyou Zhang

Let $M$ be a Carath\'eodory hyperbolic complex manifold. We show that $M$ supports a real-analytic bounded strictly plurisubharmonic function. If $M$ is also complete K\"ahler, we show that $M$ admits the Bergman metric. When $M$ is…

Complex Variables · Mathematics 2025-01-20 Kwok-Kin Wong , Sai-Kee Yeung

In this paper, we generalize the Kobayashi pseudo-distance to complex manifolds which admit holomorphic bracket generating distributions. The generalization is based on Chow's theorem in sub-Riemannian geometry. Let G be a linear semisimple…

Complex Variables · Mathematics 2018-04-11 Aeryeong Seo

We construct families of convex domains that are biholomorphic to bounded domains, but not bounded convex domains. This is accomplished by finding an obstruction related to the Gromov hyperbolicity of the Kobayashi metric.

Complex Variables · Mathematics 2020-06-29 Andrew Zimmer

Assume that the section conjecture holds over number fields. We prove then that it holds for a broad class of curves defined over finitely generated extensions of $\mathbb{Q}$. This class contains every projective, hyperelliptic curve,…

Number Theory · Mathematics 2023-03-02 Giulio Bresciani

We study the hyperbolicity of the log variety $(\mathbb{P}^n, X)$, where $X$ is a very general hypersurface of degree $d\geq 2n+1$ (which is the bound predicted by the Kobayashi conjecture). Using a positivity result for the sheaf of…

Algebraic Geometry · Mathematics 2007-05-23 Gianluca Pacienza , Erwan Rousseau

In this paper we study the positivity of the cotangent bundle of projective manifolds. We conjecture that the cotangent bundle is pseudoeffective if and only the manifold has non-zero symmetric differentials. We confirm this conjecture for…

Algebraic Geometry · Mathematics 2020-06-11 Andreas Höring , Thomas Peternell

Let $M$ be a complex manifold which admits an exhaustion by open subsets $M_j$ each of which is biholomorphic to a fixed domain $\Omega \subset \mathbb C^n$. The main question addressed here is to describe $M$ in terms of $\Omega$. Building…

Complex Variables · Mathematics 2021-08-10 G. P. Balakumar , Diganta Borah , Prachi Mahajan , Kaushal Verma

Demailly's conjecture, which is a consequence of the Green-Griffiths-Lang conjecture on varieties of general type, states that an algebraically hyperbolic complex projective variety is Kobayashi hyperbolic. Our aim is to provide evidence…

Algebraic Geometry · Mathematics 2021-09-24 Ariyan Javanpeykar , Ljudmila Kamenova

Moraga and Yeong conjectured that for a smooth complex projective variety $X$ of dimension $n$, an ample line bundle $A$ on $X$ and an integer $m \ge 3 n + 1$, very general elements of the adjoint linear system $|\omega_{X} \otimes…

Algebraic Geometry · Mathematics 2026-04-06 Minseong Kwon , Haesong Seo
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