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A compactness theorem is proved for a family of K\"{a}hler surfaces with constant scalar curvature and volume bounded from below, diameter bounded from above, Ricci curvature bounded and the signature bounded from below. Furthermore, a…

微分几何 · 数学 2013-04-04 Hongliang Shao

New examples of extremal K\"ahler metrics on blow-ups of parabolic ruled surfaces are constructed. The method is based on the gluing construction of Arezzo, Pacard and Singer. This enables to endow ruled surfaces of the form…

微分几何 · 数学 2013-01-22 Carl Tipler

We provide new examples of K-unstable polarized smooth del Pezzo surfaces using a flopped version first used by Cheltsov and Rubinstein of the test configurations introduced by Ross and Thomas. As an application, we provide new obstructions…

代数几何 · 数学 2020-10-02 Ivan Cheltsov , Jesus Martinez-Garcia

We introduce and construct a novel type of canonical metric: the semi-flat constant scalar curvature K\"ahler (semi-flat cscK) current, which naturally arises in Calabi-Yau fibrations. For a given elliptic surface $X$ with a holomorphic…

微分几何 · 数学 2025-10-17 Zhenqu Wang , Zhenlei Zhang

Let $(X,L_{X})$ be an $n$-dimensional polarized manifold. Let $D$ be a smooth hypersurface defined by a holomorphic section of $L_{X}$. In this paper, we study the existence of a complete scalar-flat K\"{a}hler metric on $X \setminus D$ on…

微分几何 · 数学 2023-03-07 Takahiro Aoi

In this paper we study QCH K\"ahler surfaces, i.e. 4-dimensional Riemannian manifolds (of signature (++++)) admitting a K\"ahler complex structure with quasi-constant holomorphic sectional curvature. We give a detailed description of QCH…

微分几何 · 数学 2024-02-08 Ewelina Mulawa

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

We show that every Kaehler algebraic curvature tensor is geometrically realizable by a Kaehler manifold of constant scalar curvature. We also show that every para-Kaehler algebraic curvature tensor is geometrically realizable by a…

微分几何 · 数学 2015-05-14 M. Brozos-Vazquez , P. Gilkey , E. Merino

In this paper we give sufficient conditions on a compact orbifold with an extremal Kaehler metric to admit a resolution with an extremal Kaehler metric. We also complete the Kaehler constant scalar curvature case.

微分几何 · 数学 2015-07-17 Claudio Arezzo , Riccardo Lena , Lorenzo Mazzieri

We show that every Kato surface (or surface with a global spherical shell) admits a locally conformally Kaehler metric.

复变函数 · 数学 2010-01-05 Marco Brunella

Let (M,J) be a compact complex 2-manifold which which admits a Kaehler metric for which the integral of the scalar curvature is non-negative. Also suppose that M does not admit a Ricci-flat K\"ahler metric. Then if M is blown up at…

dg-ga · 数学 2008-02-03 Jongsu Kim , Claude LeBrun , Massimiliano Pontecorvo

In this paper we continue our study about the existence of Kaehler metrics of constant scalar curvature (Kcsc) on blow ups at points of compact manifolds with Kcsc metrics started in math.DG/0411522. In this second part we deal with the…

微分几何 · 数学 2007-05-23 Claudio Arezzo , Frank Pacard

Indefinite Kaehler solutions of the Einstein equations are studied, and it is almost completely determined which compact complex surfaces admit such metrics.

dg-ga · 数学 2009-10-28 Jimmy Petean

Some curvature properties of Kahler manifolds of indefinite metrics are studied. Analogues of a Kulkarni's theorem are proved for such manifolds.

微分几何 · 数学 2010-08-12 Ognian Kassabov , Adrijan Borisov

We establish the optimal upper bounds for cone angles of K\"ahler-Einstein metrics with conical singularities along smooth anticanonical divisors on smooth K-unstable del Pezzo surfaces.

代数几何 · 数学 2025-09-11 Dasol Jeong , Jihun Park

In this short note, we prove the existence of constant scalar curvature K\"ahler metrics on compact K\"ahler manifolds with semi-ample canonical bundles.

微分几何 · 数学 2018-05-18 Wangjian Jian , Yalong Shi , Jian Song

We prove that every Kaehler metric, whose potential is a function of the time-like distance in the flat Kaehler-Lorentz space, is of quasi-constant holomorphic sectional curvatures, satisfying certain conditions. This gives a local…

微分几何 · 数学 2007-06-07 Georgi Ganchev , Vesselka Mihova

In this paper we study the problem of existence of orbifold Kaehler-Einstein metrics on del Pezzo surfaces of degree 1 with Du Val singular points. Moreover we compute global log canonical thresholds of del Pezzo surfaces of degree 1 with…

代数几何 · 数学 2009-04-19 Dimitra Kosta

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

The purpose of this paper is to prove the a priori estimates for constant scalar curvature Kaehler metrics with conic singularities along normal crossing divisors. The zero order estimates are proved by a reformulated version of…

微分几何 · 数学 2023-01-24 Long Li , Jian Wang , Kai Zheng