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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

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

Our goal here is to give a simple proof of the non integrable version of Brody's characterisation theorem.

Complex Variables · Mathematics 2007-05-23 R. Debalme

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

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 introduce an analog of the Kobayashi-Royden metric on a Riemannian manifold and study its basic properties.

Complex Variables · Mathematics 2023-07-13 Hervé Gaussier , Alexandre Sukhov

We provide several equivalent characterizations of Kobayashi hyperbolicity in unbounded convex domains in terms of peak and anti-peak functions at infinity, affine lines, Bergman metric and iteration theory.

Complex Variables · Mathematics 2007-10-11 Filippo Bracci , Alberto Saracco

See math.CV/0509030 which replaces this paper.

Complex Variables · Mathematics 2007-05-23 A. V. Isaev

We construct new examples of Kobayashi hyperbolic hypersurfaces in the projective 4-space. They are generic projections of the triple symmetric product of a generic curve of genus at least 7, smoothly embedded in the projective 7-space.

Algebraic Geometry · Mathematics 2007-05-23 Ciro Ciliberto , Mikhail Zaidenberg

We discuss geometric properties of covers of closed hyperbolic manifolds of dimension $n\geq 3$, branched along a totally geodesic codimension two submanifold $\Sigma$. The results are mostly known to the experts but hard to find in the…

Geometric Topology · Mathematics 2026-05-05 Ursula Hamenstädt

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

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

In this paper we determine all Kobayashi-hyperbolic 2-dimensional complex manifolds for which the group of holomorphic automorphisms has dimension 3. This work concludes a recent series of papers by the author on the classification of…

Complex Variables · Mathematics 2014-11-11 A. V. Isaev

We modify the deformation method explored previously in a joint work of B. Shiffman and the author, in order to construct further examples of Kobayashi hyperbolic surfaces in the projective 3-space of any even degree starting with degree 8.

Algebraic Geometry · Mathematics 2009-10-19 Mikhail Zaidenberg

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 present two methods of constructing low degree Kobayashi hyperbolic hypersurfaces in the projective space: the projection method and the deformation method. The talk is based on joint works of the speaker with B. Shiffman and C.…

Algebraic Geometry · Mathematics 2007-11-21 Mikhail Zaidenberg

We describe a method of defining a Hermitian metric on Kobayashi hyperbolic manifolds. The metric is distance decreasing under holomorphic mappings, up to a multiplicative constant. This method is distinct from the classical construction of…

Complex Variables · Mathematics 2025-05-22 Debraj Chakrabarti , Prachi Mahajan

This is a recent conference report on the Kobayashi Problem on hyperbolicity of generic projective hypersurfaces. As an appendix, a (non-updated) author's survey article of 1992 on the same subject, published in an edition with a limited…

Algebraic Geometry · Mathematics 2007-05-23 Mikhail Zaidenberg

We present different constructions of abstract boundaries for bounded complete (Kobayashi) hyperbolic domains in ${\mathbb C}^d$, $d \geq 1$. These constructions essentially come from the geometric theory of metric spaces. We also present,…

Complex Variables · Mathematics 2022-05-23 Filippo Bracci , Hervé Gaussier

We provide a geometric condition ensuring that a very general element of a complete linear system on an abelian variety is Kobayashi hyperbolic. Some related conjectures are also given.

Algebraic Geometry · Mathematics 2025-12-19 Federico Caucci
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