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相关论文: Curvature identities on almost Hermitian manifolds…

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We characterize quasi K\"ahler manifolds whose curvature tensor associated to the canonical Hermitian connection satisfies the first Bianchi identity. This condition is related with the third Gray identity and in the almost K\"ahler case…

微分几何 · 数学 2011-01-11 Antonio J. Di Scala , Luigi Vezzoni

We study curvature identities on contact metric manifolds on the geometry of the corresponding almost K\"aehler cones, and we provide applications of the derived curvature identities.

微分几何 · 数学 2013-12-20 JeongHyeong Park , Kouei Sekigawa , Won Min Shin

We consider complete nearly K\"ahler manifolds with the canonical Hermitian connection. We prove some metric properties of strict nearly K\"ahler manifolds and give a sufficient condition for the reducibility of the canonical Hermitian…

微分几何 · 数学 2007-05-23 Paul-Andi Nagy

In this article, we define the Chern-Robinson connection on the complexify tangent bundle of an almost Robinson manifold and we study the curvature associated to. Various Bianchi identities are obtained together with an application to…

微分几何 · 数学 2026-02-20 Robert Petit

We study curvature properties of four-dimensional almost Hermitian manifolds with vanishing Bochner curvature tensor as defined by Tricerri and Vanhecke. We give local structure theorems for such Kaehler manifolds, and find out several…

微分几何 · 数学 2007-10-11 Y. Euh , J. Lee , J. H. Park , K. Sekigawa , A. Yamada

In this paper, we use the canonical connection instead of Levi-Civita connection to study the smooth maps between almost Hermitian manifolds, especially, the pseudoholomorphic ones. By using the Bochner formulas, we obtian the…

微分几何 · 数学 2021-05-21 Chiakuei Peng , Xiaowei Xu

A local classification of the Hermitian manifolds with flat associated connection is given. Hermitian manifolds admitting locally a conformal metric with flat associated connection are characterized by a curvature identity. Locally…

微分几何 · 数学 2011-09-15 Georgi Ganchev , Ognian Kassabov

The paper observes an almost Hermitian manifold as an example of a generalized Riemannian manifold and examines the application of a quarter-symmetric connection on the almost Hermitian manifold. The almost Hermitian manifold with…

微分几何 · 数学 2024-01-15 Milan Zlatanović , Miroslav Maksimović

We study the geometry of the canonical connection on a quasi-Kaehler manifold with Norden metric. We consider the cases when the canonical connection has Kaehler curvature tensor and parallel torsion, and derive conditions for an…

微分几何 · 数学 2011-01-24 Dimitar Mekerov

On an almost Hermitian manifold, we have two Hermitian scalar curvatures with respect to any canonical Hermitian connection defined by P. Gauduchon. Explicit formulas of these two Hermitian scalar curvatures are obtained in terms of…

微分几何 · 数学 2019-01-30 Jixiang Fu , Xianchao Zhou

On 5-dimensional almost contact B-metric manifolds, the form of any K\"ahler-type tensor (i.e. a tensor satisfying the properties of the curvature tensor of the Levi-Civita connection in the special class of the parallel structures on the…

微分几何 · 数学 2015-05-06 Mancho Manev , Miroslava Ivanova

In this paper we discuss curvature tensors in the context of Absolute Parallelism geometry. Different curvature tensors are expressed in a compact form in terms of the torsion tensor of the canonical connection. Using the Bianchi identities…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Nabil L. Youssef , Amr M. Sid-Ahmed

A natural connection with totally skew-symmetric torsion on almost contact manifolds with B-metric is constructed. The class of these manifolds, where the considered connection exists, is determined. Some curvature properties for this…

微分几何 · 数学 2012-05-21 Mancho Manev

We study the curvature of almost Hermitian manifolds and their special analogues via intrinsic torsion and representation theory. By deriving different forumlae for the skew-symmetric part of the star-Ricci curvature, we find that some of…

微分几何 · 数学 2007-05-23 Francisco Martin Cabrera , Andrew Swann

We consider a pair of smooth manifolds, which are the counterparts in the even-dimensional and odd-dimensional cases. They are separately an almost complex manifold with Norden metric and an almost contact manifolds with B-metric,…

微分几何 · 数学 2015-05-06 Mancho Manev

A 3-dimensional Riemannian manifold equipped with a tensor structure of type $(1,1)$, whose fourth power is the identity, is considered. This structure acts as an isometry with respect to the metric. A Riemannian almost product manifold…

微分几何 · 数学 2025-06-06 Iva Dokuzova

We study the local commutation relation between the Lefschetz operator and the exterior differential on an almost complex manifold with a compatible metric. The identity that we obtain generalizes the backbone of the local K\"ahler…

微分几何 · 数学 2020-08-12 Joana Cirici , Scott O. Wilson

In this paper, by using the Bochner technique on almost Hermitian manifolds, we obtain a complex Hessian comparison for almost Hermitian manifolds generalizing the Laplacian comparison for almost Hermitian manifolds by Tossati, and reprove…

微分几何 · 数学 2012-09-27 Chengjie Yu

The canonical connection on a Riemannian almost product manifold is an analogue to the Hermitian connection on an almost Hermitian manifold. In this paper we consider the canonical connection on a class of Riemannian almost product…

微分几何 · 数学 2012-03-22 Dobrinka Gribacheva , Dimitar Mekerov

We consider strict and complete nearly Kaehler manifolds with the canonical Hermitian connection. The holonomy representation of the canonical Hermitian connection is studied. We show that a strict and complete nearly Kaehler is locally a…

微分几何 · 数学 2007-05-23 Paul-Andi Nagy
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