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arXiv 1001.2129math.DG
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关于调和形式乘积的注记

Remarks on the product of harmonic forms

Liviu Ornea, Mihaela Pilca

摘要:

一个度量是形式的,如果所有调和形式的乘积都是调和的。形式度量的存在意味着流形的沙利文形式,因此形式度量只能在非常有限的拓扑中存在。我们表明,一个翘曲的产品度量是正式的当且仅当翘曲函数是常数,并推导出进一步的拓扑障碍存在的正式度量。特别是,我们确定的必要条件和充分条件的Vaisman度量是正式的。

英文摘要:

A metric is formal if all products of harmonic forms are again harmonic. The existence of a formal metric implies Sullivan formality of the manifold, and hence formal metrics can exist only in presence of a very restricted topology. We show that a warped product metric is formal if and only if the warping function is constant and derive further topological obstructions to the existence of formal metrics. In particular, we determine necessary and sufficicient conditions for a Vaisman metric to be formal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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