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arXiv 1302.3841math.DG
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非紧调和流形

Noncompact harmonic manifolds

Gerhard Knieper, Norbert Peyerimhoff

摘要:

Lichnerowicz猜想断言所有调和流形要么是平坦的,要么是秩为1的局部对称空间。这个猜想已由Z. I.具有紧泛覆盖的调和流形的Szabo。E. Damek和F.利玛窦提供的例子表明,在非紧的情况下,猜想是错误的。然而,这样的流形不允许紧商。所有非紧调和空间的分类仍然是一个非常困难的公开问题。本文综述了非紧单连通调和流形的最新结果,并证明了许多新的结果,包括一般的非紧调和流形和具有纯指数体积增长的非紧调和流形.

英文摘要:

The Lichnerowicz conjecture asserts that all harmonic manifolds are either flat or locally symmetric spaces of rank 1. This conjecture has been proved by Z.I. Szabo for harmonic manifolds with compact universal cover. E. Damek and F. Ricci provided examples showing that in the noncompact case the conjecture is wrong. However, such manifolds do not admit a compact quotient. The classification of all noncompact harmonic spaces is still a very difficult open problem. In this paper we provide a survey on recent results on noncompact simply connected harmonic manifolds, and we also prove many new results, both for general noncompact harmonic manifolds and for noncompact harmonic manifolds with purely exponential volume growth.

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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