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arXiv 2005.13411math.DG
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Hermitian流形曲率的一个新的正性条件

A new positivity condition for the curvature of Hermitian manifolds

Freid Tong

摘要:

在本文中,我们引入了一种新的Hermitian流形曲率的正性条件,它将非负二次正交对分曲率的概念推广到非Kähler情形。我们推导出封闭$(1, 1)$ -形式的Bochner公式,并证明了如果一个Hermitian流形满足我们的正性条件,那么任何类$α\in H^{1, 1}_{BC}(X)$都可以用一个封闭的$(1, 1)$ -形式来表示,该形式与Bismut联络是平行的.最后,我们证明了这样一个曲率正性条件在某些广义Hopf流形和某些Vaisman流形上成立。

英文摘要:

In this note, we introduce a new type of positivity condition for the curvature of a Hermitian manifold, which generalizes the notion of nonnegative quadratic orthogonal bisectional curvature to the non-Kähler case. We derive a Bochner formula for closed $(1, 1)$-forms from which this condition appears naturally and prove that if a Hermitian manifold satisfy our positivity condition, then any class $α\in H^{1, 1}_{BC}(X)$ can be represented by a closed $(1, 1)$-form which is parallel with respect to the Bismut connection. Lastly, we show that such a curvature positivity condition holds on certain generalized Hopf manifolds and on certain Vaisman manifolds.

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