REMARKS ON THE PRODUCT OF HARMONIC FORMS
REMARKS ON THE PRODUCT OF HARMONIC FORMS
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关于调和形式的乘积的备注
DOI:
10.2140/pjm.2011.250.353
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发表时间:
2010
期刊:
影响因子:
--
通讯作者:
Mihaela Pilca
中科院分区:
文献类型:
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作者:
L. Ornea;Mihaela Pilca
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 the 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 the necessary and sufficient conditions for a Vaisman metric to be formal.