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In this paper we give classification of K\"ahler surfaces of generalized Calabi type.

微分几何 · 数学 2022-11-18 Włodzimierz Jelonek , Ewelina Mulawa

The aim of this paper is to describe Kahler surfaces with quasi-constant holomorphic curvature

微分几何 · 数学 2017-06-26 Wlodzimierz Jelonek

In this paper we describe QCH K\"ahler surfaces $(M,g,J)$ of generalized orthotoric type. We introduce a distinguished orthonormal frame on $(M,g)$ and give the structure equations for $(M,g,J)$. In the case when $I$ is conformally K\"ahler…

微分几何 · 数学 2022-11-18 Włodzimierz Jelonek

In this paper we prove that some well known K\"ahler surfaces with zero scalar curvature are QCH K\"ahler. We prove that family of generalized Taub-Nut K\"ahler surfaces parametrized by $k\in[-1,1]$ is of orthotoric type for $k\in(-1,1)$…

微分几何 · 数学 2025-02-11 Włodzimierz Jelonek

In this article we introduce the notion of Polyhedral Kahler manifolds, even dimensional polyhedral manifolds with unitary holonomy. We concentrate on the 4-dimensional case, prove that such manifolds are smooth complex surfaces, and…

微分几何 · 数学 2016-08-04 Dmitri Panov

In this paper, we construct metallic K\"ahler and nearly metallic K\"ahler structures on Riemanian manifolds. For such manifolds with these structures, we study curvature properties. Also we describe linear connections on the manifold,…

综合数学 · 数学 2019-07-02 Sibel Turanli , Aydin Gezer , Hasan Cakicioglu

The aim of this paper is to describe complex foliations on Kahler surfaces.

微分几何 · 数学 2019-04-15 Wlodzimierz Jelonek

The aim of this paper is to classify compact Kahler manifolds with quasi-constant holomorphic sectional curvature.

微分几何 · 数学 2016-02-26 Wlodzimierz Jelonek

Polyhedral K\"ahler surfaces are a class of complex surfaces, which are flat everywhere except on a two-dimensional skeleton. They are defined as a generalisation of the "gluing a polygon side by side" construction of flat Riemann surfaces.…

代数几何 · 数学 2018-06-11 Cécile Gachet

Let (M,J) be a minimal compact complex surface of Kaehler type. It is shown that the smooth 4-manifold M admits a Riemannian metric of positive scalar curvature iff (M,J) admits a KAEHLER metric of positive scalar curvature. This extends…

dg-ga · 数学 2008-02-03 Claude LeBrun

We present new constructions of Kaehler metrics with constant scalar curvature on complex surfaces, in particular on certain del Pezzo surfaces. Some higher dimensional examples are provided as well.

微分几何 · 数学 2007-05-23 Yann Rollin , Michael A. Singer

The Kaehler manifolds of quasi-constant holomorphic sectional curvatures are introduced as Kaehler manifolds with complex distribution of codimension two, whose holomorphic sectional curvature only depends on the corresponding point and the…

微分几何 · 数学 2008-03-04 Georgi Ganchev , Vesselka Mihova

In this manuscript we study natural symmetries of Kaehler manifolds: constant holomorphic sectional curvature Kaheler manifolds, semisymmetric Kaehler manifolds and holomorphically pseudosymmetric Kaehler manifolds. We get characterization…

微分几何 · 数学 2024-02-08 Alma L. Albujer , Jorge Alcázar , Magdalena Caballero

The space $SL(2,\mathbb{R})\times SL(2,\mathbb{R})$ admits a natural homogeneous pseudo-Riemannian nearly Kaehler structure. We investigate almost complex surfaces in this space. In particular we obtain a complete classification of the…

微分几何 · 数学 2020-06-23 Elsa Ghandour , Luc Vrancken

Generalized Calabi-Gray manifolds are non-K\"ahler complex manifolds with very explicit geometry yet not being homogeneous. In this note, we demonstrate that how generalized Calabi-Gray manifolds can be used to answer some questions in…

微分几何 · 数学 2023-07-26 Teng Fei

We continue to develop our method for effectively computating the special K\"ahler geometry on the moduli space of Calabi-Yau manifolds. We generalize it to all polynomial deformations of Fermat hypersurfaces.

高能物理 - 理论 · 物理学 2018-12-05 Konstantin Aleshkin , Alexander Belavin

We construct the first examples of non-K\"ahler complex structures on $R^4$. These complex surfaces have some analogies with the complex structures constructed in early Fifties by Calabi and Eckmann on the products of two odd-dimensional…

几何拓扑 · 数学 2017-06-14 Antonio J. Di Scala , Naohiko Kasuya , Daniele Zuddas

We study the K\"ahler geometry of stage n Bott manifolds, which can be viewed as $n$-dimensional generalizations of Hirzebruch surfaces. We show, using a simple induction argument and the generalized Calabi construction from…

A contact hypersurface in a Kaehler manifold is a real hypersurface for which the induced almost contact metric structure determines a contact structure. We carry out a systematic study of contact hypersurfaces in Kaehler manifolds. We then…

微分几何 · 数学 2013-12-11 Jurgen Berndt , Young Jin Suh

This article finds constant scalar curvature Kahler metrics on certain compact complex surfaces. The surfaces considered are those admitting a holomorphic submersion to a curve, with fibres of genus at least 2. The proof is via an adiabatic…

微分几何 · 数学 2007-05-23 Joel Fine
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