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We survey the properties of Brody and Kobayashi hyperbolic manifolds.

Algebraic Geometry · Mathematics 2007-05-23 Izzet Coskun

We study the Kobayashi pseudodistance for orbifolds, proving an orbifold version of Brody's theorem and classifying which one-dimensional orbifolds are hyperbolic.

Complex Variables · Mathematics 2007-05-23 Frederic Campana , Joerg Winkelmann

We prove an analogue of the Brody lemma in the framework of Riemannian manifolds. We also present new examples of Riemannian manifolds that are hyperbolic in the sense of Kobayashi.

Complex Variables · Mathematics 2025-09-09 Hervé Gaussier , Alexandre Sukhov

The classical Brody's theorem asserts the equivalence between two notions of hyperbolicity for compact complex spaces, one named after Kobayashi and one expressed in terms of lack of non constant holomorphic entire functions (compactness is…

Complex Variables · Mathematics 2013-07-19 Simone Borghesi , Giuseppe Tomassini

In this paper we define Kobayashi-Royden pseudonorm for almost complex manifolds. Its basic properties known from the complex analysis are preserved in the nonintegrable case as well. We prove that the pseudodistance induced by this…

dg-ga · Mathematics 2008-02-03 Boris S. Kruglikov

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

Let D be a smooth relatively compact and strictly J-pseudoconvex domain in a four dimensional almost complex manifold (M,J). We give sharp estimates of the Kobayashi metric. Our approach is based on an asymptotic quantitative description of…

Complex Variables · Mathematics 2015-05-13 Florian Bertrand

We proove an Ahlfors' like inequality for the holomorphic curves of a complex compact Kobayashi hyperbolic manifold.

Complex Variables · Mathematics 2009-01-24 Benoit Saleur

We define the Kobayashi quotient of a complex variety by identifying points with vanishing Kobayashi pseudodistance between them and show that if a compact complex manifold has an automorphism whose order is infinite, then the fibers of…

Differential Geometry · Mathematics 2017-04-12 Fedor Bogomolov , Ljudmila Kamenova , Steven Lu , Misha Verbitsky

For a generic hypersurface $\mathbb{X}^{n-1} \subset \mathbb{P}^n(\mathbb{C})$ of degree \[ d \,\geqslant\, n^{2n} \] (1) $\mathbb{P}^n \big\backslash \mathbb{X}^{n-1}$ is Kobayashi-hyperbolically imbedded in $\mathbb{P}^n$; (2)…

Algebraic Geometry · Mathematics 2018-07-31 Joël Merker

We extend the definition of the Kobayashi pseudodistance to almost complex manifolds and show that its familliar properties are for the most part preserved. We also study the automorphism group of an almost complex manifold and finish with…

dg-ga · Mathematics 2008-02-03 Boris S. Kruglikov , Marius Overholt

In this paper we extend the notion of the Kobayashi-Royden pseudonorm for almost complex manifolds. Its basic properties known from the complex analysis are preserved in the nonintegrable case as well. The main theorem on coincidence of the…

Complex Variables · Mathematics 2007-05-23 B. Kruglikov

We establish a lower estimate for the Kobayashi-Royden infinitesimal pseudometric on an almost complex manifold $(M,J)$ admitting a bounded strictly plurisubharmonic function. We apply this result to study the boundary behaviour of the…

Complex Variables · Mathematics 2007-05-23 H. Gaussier , A. Sukhov

We study the metric compactification of a Kobayashi hyperbolic complex manifold \(\mathcal{X} \) equipped with the Kobayashi distance \( \mathsf{k}_{\mathcal{X}} \). We show that this compactification is genuine -- i.e., \( \mathcal{X} \)…

Complex Variables · Mathematics 2025-08-04 Vikramjeet Singh Chandel , Nishith Mandal

A compact complex manifold is Kobayashi non-hyperbolic if there exists an entire curve on it. Using mirror symmetry we establish that there are (possibly singular) elliptic or rational curves on any Calabi-Yau manifold $X$, whose mirror…

Differential Geometry · Mathematics 2020-09-04 Ljudmila Kamenova , Cumrun Vafa

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

In this article we study the injective Kobayashi metric on complex surfaces.

Complex Variables · Mathematics 2020-10-07 John Erik Fornaess , Maria Trybula , Erlend Fornaess Wold

We prove that a cyclic cover of a smooth complex projective variety is Brody hyperbolic if its branch divisor is a generic small deformation of a large enough multiple of a Brody hyperbolic base-point-free ample divisor. We also show the…

Algebraic Geometry · Mathematics 2018-06-19 Yuchen Liu

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

In this paper, we extend the notion of visibility relative to the Kobayashi distance to domains in arbitrary complex manifolds. Visibility here refers to a property resembling visibility in the sense of Eberlein--O'Neill for Riemannian…

Complex Variables · Mathematics 2025-07-04 Rumpa Masanta
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