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We study two kinds of transformation groups of a compact locally conformally Kahler (l.c.K.) manifold. First we study compact l.c.K. manifolds with parallel Lee form by means of the existence of a holomorphic l.c.K. flow. Next, we introduce…

微分几何 · 数学 2007-05-23 Y. Kamishima , L. Ornea

A locally conformally K\"ahler (LCK) manifold $M$ is one which is covered by a K\"ahler manifold $\tilde M$ with the deck transform group acting conformally on $\tilde M$. If $M$ admits a holomorphic flow, acting on $\tilde M$ conformally,…

代数几何 · 数学 2010-07-09 Liviu Ornea , Misha Verbitsky

A manifold M is locally conformally Kahler (LCK) if it admits a Kahler covering with monodromy acting by holomorphic homotheties. For a compact connected group G acting on an LCK manifold by holomorphic automorphisms, an averaging procedure…

微分几何 · 数学 2012-08-10 Liviu Ornea , Misha Verbitsky

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

A locally conformally K\"ahler (LCK) manifold is a complex manifold covered by a K\"ahler manifold, with the covering group acting by homotheties. We show that if such a compact manifold X admits a holomorphic submersion with positive…

微分几何 · 数学 2020-07-30 Liviu Ornea , Maurizio Parton , Victor Vuletescu

In this paper we show as main results two structure theorems of a compact homogeneous locally conformally Kaehler (or shortly l.c.K.) manifold, a holomorphic structure theorem asserting that it has a structure of holomorphic principal fiber…

复变函数 · 数学 2016-01-19 Keizo Hasegawa , Yoshinobu Kamishima

We will discuss in this paper homogeneous locally conformally Keahler (or shortly homogeneous l.c.K.) manifolds and locally homogeneous l.c.K. manifolds from various aspects of study in the field of l.c.K. geometry. We will provide a survey…

微分几何 · 数学 2016-01-19 Keizo Hasegawa , Yoshinobu Kamishima

A Hopf manifold is a compact complex manifold of which the universal covering is C^n\{0}. In this note we show that any Hopf manifold admits a locally conformally Kaehler structure (shortly lcK structure), by constructing a complex analytic…

微分几何 · 数学 2023-06-16 Keizo Hasegawa

A locally conformally Kahler (LCK) manifold is a complex manifold admitting a Kahler covering M, such that its monodromy acts on this covering by homotheties. A compact LCK manifold is called LCK with potential if M admits an authomorphic…

微分几何 · 数学 2016-01-28 Liviu Ornea , Misha Verbitsky

A locally conformally K\"ahler (lcK) manifold is a complex manifold $(M,J)$ together with a Hermitian metric $g$ which is conformal to a K\"ahler metric in the neighbourhood of each point. In this paper we obtain three classification…

微分几何 · 数学 2021-06-15 Farid Madani , Andrei Moroianu , Mihaela Pilca

A Hermitian structure on a manifold is called locally conformally K\"ahler (LCK) if it locally admits a conformal change which is K\"ahler. In this survey we review recent results of invariant LCK structures on solvmanifolds and present…

微分几何 · 数学 2020-04-06 Adrián Andrada , Marcos Origlia

We give an equivalent definition of compact locally conformally hyperk\"ahler manifolds in terms of the existence of a nondegenerate complex two-form with natural properties. This is a conformal analogue of Beauville's theorem stating that…

微分几何 · 数学 2020-07-30 Liviu Ornea , Alexandra Otiman

An LCK (locally conformally Kahler) manifold is a complex manifold admitting a Kahler covering with monodromy acting by homotheties. Hopf manifolds and their submanifolds are the prime examples. This book presents an introduction to the…

微分几何 · 数学 2024-12-10 Liviu Ornea , Misha Verbitsky

Locally conformally Kahler (LCK) manifolds with potential are those which admit a Kahler covering with a proper, automorphic Kaehler potential. Existence of a potential can be characterized cohomologically as a vanishing of a certain…

微分几何 · 数学 2010-04-07 Liviu Ornea , Misha Verbitsky

We study Hamiltonian actions of compact Lie groups K on Kaehler manifolds which extend to a holomorphic action of the complexified group K^C. For a closed normal subgroup L of K we show that the Kaehlerian reduction with respect to L is a…

辛几何 · 数学 2011-04-13 Daniel Greb , Peter Heinzner

We prove that any compact homogeneous locally conformally K\"ahler manifold has parallel Lee form.

微分几何 · 数学 2015-06-16 Paul Gauduchon , Andrei Moroianu , Liviu Ornea

A manifold $M$ is locally conformally Kahler (LCK) if it admits a Kahler covering with monodromy acting by holomorphic homotheties. Let $M$ be an LCK manifold admitting a holomorphic conformal flow of diffeomorphisms, lifted to a…

微分几何 · 数学 2021-03-01 Liviu Ornea , Misha Verbitsky

We present an overview of recent results in locally conformally K\"ahler geometry, with focus on the topological properties which obstruct the existence of such structures on compact manifolds.

微分几何 · 数学 2011-03-18 Liviu Ornea , Misha Verbitsky

A locally conformally Kahler (LCK) manifold is a manifold which is covered by a Kahler manifold, with the deck transform group acting by homotheties. We show that the blow-up of a compact LCK manifold along a complex submanifold admits an…

代数几何 · 数学 2013-10-07 Liviu Ornea , Misha Verbitsky , Victor Vuletescu

We study compact toric strict locally conformally K\"ahler manifolds. We show that the Kodaira dimension of the underlying complex manifold is $-\infty$ and that the only compact complex surfaces admitting toric strict locally conformally…

微分几何 · 数学 2019-01-08 Farid Madani , Andrei Moroianu , Mihaela Pilca
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