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Local description of Bochner-flat (pseudo-)Kähler metrics
Communications in Analysis and Geometry ( IF 0.7 ) Pub Date : 2021-05-01 , DOI: 10.4310/cag.2021.v29.n3.a1
Alexey V. Bolsinov 1 , Stefan Rosemann 2
Affiliation  

The Bochner tensor is the Kähler analogue of the conformal Weyl tensor. In this article, we derive local (i.e., in a neighbourhood of almost every point) normal forms for a (pseudo-)Kähler manifold with vanishing Bochner tensor. The description is pined down to a new class of symmetric spaces which we describe in terms of their curvature operators. We also give a local description of weakly Bochner-flat metrics defined by the property that the Bochner tensor has vanishing divergence. Our results are based on the local normal forms for c-projectively equivalent metrics. As a byproduct, we also describe all Kähler–Einstein metrics admitting a $c$-projectively equivalent one.

中文翻译:

Bochner-flat(伪)Kähler指标的本地描述

Bochner张量是保形Weyl张量的Kähler类似物。在本文中,我们推导了带有假Bochner张量的(伪)Kähler流形的局部(即,几乎在每个点附近)正态形式。该描述被归结为一类新的对称空间,我们根据它们的曲率算符对其进行描述。我们还给出了由Bochner张量消失的特性定义的弱Bochner平坦度量的局部描述。我们的结果基于c投影等效度量的局部范式。作为副产品,我们还描述了所有接受Kähler-Einstein度量的指标,这些指标均接受$ c $的投影等价物。
更新日期:2021-05-11
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