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Our aim here is to investigate the holomorphic geometric structures on compact complex manifolds which may not be K\"ahler. We prove that holomorphic geometric structures of affine type on compact Calabi-Yau manifolds with polystable…

Differential Geometry · Mathematics 2016-02-16 Indranil Biswas , Sorin Dumitrescu

We study locally homogeneous rigid geometric structures on surfaces. We show that a locally homogeneous projective connection on a compact surface is flat. We also show that a locally homogeneous unimodular affine connection on a two…

Differential Geometry · Mathematics 2009-07-24 Sorin Dumitrescu

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…

Differential Geometry · Mathematics 2016-01-19 Keizo Hasegawa , Yoshinobu Kamishima

For any smooth projective variety with holomorphic locally homogeneous structure modelled on a homogeneous algebraic variety, we determine all the subvarieties of it which develop to the model.

Algebraic Geometry · Mathematics 2024-04-09 Indranil Biswas , Benjamin McKay

This article investigates a few questions about orbits of local automorphisms in manifolds endowed with rigid geometric structures. We give sufficient conditions for local homogeneity in a broad class of such structures, namely Cartan…

Differential Geometry · Mathematics 2020-05-20 Vincent Pecastaing

The results of the paper concern the topological structure of complete riemannian manifolds with cyclic holonomy groups and low-dimensional orientable complete flat manifolds. We also discuss related results such as the affine…

Differential Geometry · Mathematics 2007-05-23 M. Sadowski

We prove the Hodge symmetry type result on the Dolbeault cohomology of Oeljeklaus-Toma manifolds with values in the direct sum of holomorphic line bundles. Consequently, we show the vanishing and non-vanishing of Dolbeault cohomology of…

Algebraic Geometry · Mathematics 2023-02-28 Hisashi Kasuya

We classify holomorphic Cartan geometries on every compact complex curve, and on every compact complex surface which contains a rational curve.

Differential Geometry · Mathematics 2019-11-12 Benjamin McKay

We investigate complex structures on the Oeljeklaus-Toma manifolds. The Oeljeklaus-Toma manifolds are defined using complex embeddings of number fields. By replacing these embeddings with their conjugates, one obtains other manifolds that…

Differential Geometry · Mathematics 2025-06-24 Shuho Kanda

In [DM] it was asked whether all flat holomorphic Cartan geometries (G,H) on a complex torus are translation invariant. We answer this affimatively under the assumption that the complex Lie group G is affine. More precisely, we show that…

Differential Geometry · Mathematics 2018-02-14 Indranil Biswas , Sorin Dumitrescu

A linear connection on a Lie algebroid is called a Cartan connection if it is suitably compatible with the Lie algebroid structure. Here we show that a smooth connected manifold $M$ is locally homogeneous - i.e., admits an atlas of charts…

Differential Geometry · Mathematics 2013-11-27 Anthony D. Blaom

It is shown that the geometry of locally homogeneous multisymplectic manifolds (that is, smooth manifolds equipped with a closed nondegenerate form of degree > 1, which is locally homogeneous of degree k with respect to a local Euler field)…

Differential Geometry · Mathematics 2016-04-11 A. Echeverría-Enríquez , A. Ibort , M. C. Muñoz-Lecanda , N. Román-Roy

We study holomorphic locally homogeneous geometric structures modelled on line bundles over the projective line. We classify these structures on primary Hopf surfaces. We write out the developing map and holonomy morphism of each of these…

Differential Geometry · Mathematics 2019-11-12 Benjamin McKay , Alexey Pokrovskiy

We prove that any holomorphic locally homogeneous geometric structure on a complex torus, modelled on a complex homogeneous surface, is translation invariant. We conjecture that this result is true is any dimension. In higher dimension we…

Differential Geometry · Mathematics 2019-11-12 Sorin Dumitrescu , Benjamin McKay

On all compact complex surfaces (modulo finite unramified coverings), we classify all of the locally homogeneous geometric structures which are locally isomorphic to the exotic homogeneous surfaces of Lie.

Differential Geometry · Mathematics 2019-11-12 Benjamin McKay

For compact complex manifolds with vanishing first Chern class that are compact torus principal bundles over K\"ahler manifolds, we prove that all holomorphic geometric structures on them, of affine type, are locally homogeneous. For a…

Differential Geometry · Mathematics 2020-02-12 Indranil Biswas , Sorin Dumitrescu

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…

Complex Variables · Mathematics 2016-01-19 Keizo Hasegawa , Yoshinobu Kamishima

We construct integrable holomorphic G-structures and flat holomorphic Cartan geometries on every complex Hopf manifold, without using the normal forms given by the Poincar\'e-Dulac Theorem. We provide a new proof of the latter using charts…

Differential Geometry · Mathematics 2025-01-22 Matthieu Madera

We prove various classification results for homogeneous locally conformally symplectic manifolds. In particular, we show that a homogeneous locally conformally Kaehler manifold of a reductive group is of Vaisman type, if the normalizer of…

Differential Geometry · Mathematics 2016-01-15 Dmitri V. Alekseevsky , Vicente Cortes , Keizo Hasegawa , Yoshinobu Kamishima

We prove that the compact Kaehler manifolds with first Chern class nonnegative that admit holomorphic parabolic geometries are the flat bundles of rational homogeneous varieties over complex tori. We also prove that the compact Kaehler…

Differential Geometry · Mathematics 2019-11-12 Benjamin McKay
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