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This is an account of some aspects of the geometry of K\"ahler affine metrics based on considering them as smooth metric measure spaces and applying the comparison geometry of Bakry-Emery Ricci tensors. Such techniques yield a version for…

微分几何 · 数学 2017-05-03 Daniel J. F. Fox

In this paper, we consider a left invariant complex Finsler metric $F$ on a complex Lie group. Using the technique of invariant frames, we prove the following properties for $(G,F)$. First, the metric $F$ must be a complex Berwald metric.…

微分几何 · 数学 2025-12-24 Xiyun Xu , Ming Xu

We study a system of equations on a compact complex manifold, that couples the scalar curvature of a Kaehler metric with a spectral function of a first-order deformation of the complex structure. The system comes from an…

微分几何 · 数学 2022-07-08 Carlo Scarpa

A locally conformally K\"ahler (LCK) manifold is a complex manifold $M$ which has a K\"ahler structure on its cover, such that the deck transform group acts on it by homotheties. Assume that the K\"ahler form is exact on the minimal…

微分几何 · 数学 2024-05-24 Liviu Ornea , Misha Verbitsky

In the study of holomorphic maps, the term "rigidity" refers to certain types of results that give us very specific information about a general class of holomorphic maps owing to the geometry of their domains or target spaces. Under this…

复变函数 · 数学 2015-08-28 Gautam Bharali , Indranil Biswas

We show that hyperplane sections of strongly formal manifolds inherit strong formality. In particular, this property holds for generalized complete intersections defined by positive line bundles with trivial first de Rham cohomology group.…

微分几何 · 数学 2026-04-15 Lapo Rubini

On a compact K\"ahler manifold, we introduce a notion of almost nonpositivity for the holomorphic sectional curvature, which by definition is weaker than the existence of a K\"ahler metric with semi-negative holomorphic sectional curvature.…

微分几何 · 数学 2020-11-12 Yashan Zhang

In this note, we prove a Schwarz-Pick type lemma for minimal maps between negatively curved Riemannian surfaces. More precisely, we prove that if $f:M \to N$ is a minimal map with bounded Jacobian between two complete negatively curved…

微分几何 · 数学 2019-04-02 Andreas Savas-Halilaj

A locally conformally Kaehler (l.c.K.) manifold is a complex manifold admitting a Kaehler covering $\tilde M$, with each deck transformation acting by Kaehler homotheties. A compact l.c.K. manifold is Vaisman if it admits a holomorphic flow…

微分几何 · 数学 2019-09-02 Liviu Ornea , Misha Verbitsky

In this paper we describe an approach to complex Finsler metrics suitable to deal with global questions, and stressing the similarities between hermitian and complex Finsler metrics. Let $F$ be a smooth complex Finsler metric on a complex…

复变函数 · 数学 2016-09-06 Marco Abate , Giorgio Patrizio

For complete Riemannian manifolds with vanishing Bach tensor and positive constant scalar curvature, we provide a rigidity theorem characterized by some pointwise inequalities. Furthermore, we prove some rigidity results under an inequality…

微分几何 · 数学 2018-08-09 Bingqing Ma , Guangyue Huang

In this paper, we consider some generalized holomorphic maps between pseudo-Hermitian manifolds. These maps include the \emph{CR} maps and the transversally holomorphic maps. In terms of some sub-Laplacian or Hessian type Bochner formulas,…

微分几何 · 数学 2019-09-13 Yuxin Dong , Yibin Ren , Weike Yu

In this paper we prove a Schwarz-Pick lemma for the modulus of holomorphic mappings from the polydisk into the unit ball. This result extends some related results.

复变函数 · 数学 2013-08-01 Shaoyu Dai , Yifei Pan

A classification theorem for nearly K\"ahler manifolds of constant antiholomorphic sectional curvature is proved.

微分几何 · 数学 2010-09-15 Georgi Ganchev , Ognian Kassabov

We prove that a complete noncompact K\"ahler surface with positive and bounded sectional curvature is biholomorphic to $\mathbb{C}^2$. This result confirms a special case of Yau's conjecture that a complete noncompact K\"ahler $n$-manifold…

微分几何 · 数学 2025-11-11 Ved Datar , Vamsi Pritham Pingali , Harish Seshadri

Let $M$ be a closed complex submanifold in ${\mathbb C}^N$ with the complete K\"ahler metric induced by the Euclidean metric. Several finiteness theorems on the $L^p$ Bergman space of holomorphic sections of a given Hermitian line bundle…

复变函数 · 数学 2020-09-21 Bo-Yong Chen , Yuanpu Xiong

In this note, we continue the investigation of a projective K\"ahler manifold $M$ of semi-negative holomorphic sectional curvature $H$. We introduce a new differential geometric numerical rank invariant which measures the number of linearly…

代数几何 · 数学 2023-03-31 Gordon Heier , Steven S. Y. Lu , Bun Wong , Fangyang Zheng

This is partly a survey and partly a research article. Some known results and open problems about Kaehler groups (fundamental groups of compact Kaehler manifolds) are discussed. A new notion of Kaehler homomorphism is introduced. This is a…

代数几何 · 数学 2009-08-07 Donu Arapura

We prove an analogue of E. Levi's Continuity Principle for meromorphic mappings with values in arbitrary compact complex manifolds in place of the Riemann sphere $\cc\pp^1$. The result is achieved by introducing a new extension method for…

复变函数 · 数学 2009-09-25 Sergey Ivashkovich

In this paper, we prove a $\partial\bar{\partial}$-type lemma on compact K\"ahler manifolds for logarithmic differential forms valued in the dual of a certain pseudo-effective line bundle, thereby confirming a conjecture proposed by X. Wan.…

代数几何 · 数学 2026-02-23 Runze Zhang