Isoparametric foliation and a problem of Besse on generalizations of Einstein condition
Isoparametric foliation and a problem of Besse on generalizations of Einstein condition
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等参叶化和爱因斯坦条件推广的贝斯问题
DOI:
10.1016/j.aim.2015.09.003
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发表时间:
2013-07
影响因子:
1.7
通讯作者:
Wenjiao Yan
中科院分区:
文献类型:
--
作者:
Zizhou Tang;Wenjiao Yan
The focal sets of isoparametric hypersurfaces in spheres with g= 4 are all Willmore submanifolds, being minimal but mostly non-Einstein [25],[22]. Inspired by A. Gray's view, the present paper shows that these focal sets are all A-manifolds but rarely Ricci parallel, except possibly for the only unclassified case. As a byproduct, it gives infinitely many simply-connected examples to the problem 16.56 (i) of Besse concerning generalizations of the Einstein condition.
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DOI:
--
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