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arXiv 2008.13588math.DG
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秩为2的紧李群的测地轨道空间

Geodesic orbit spaces of compact Lie groups of rank two

Nikolaos Panagiotis Souris

摘要:

测地线轨道空间是一类黎曼齐性空间(G/H,g),其测地线是G的单参数子群的轨道。本文对秩为2的紧李群的单连通测地轨道空间进行了分类。证明了度量g不是由G上的双不变度量导出的唯一空间是某些球面和射影空间,它们具有由Hopf纤维化导出的度量.

英文摘要:

Geodesic orbit spaces are those Riemannian homogeneous spaces (G/H,g) whose geodesics are orbits of one-parameter subgroups of G. We classify the simply connected geodesic orbit spaces where G is a compact Lie group of rank two. We prove that the only such spaces for which the metric g is not induced from a bi-invariant metric on G are certain spheres and projective spaces, endowed with metrics induced from Hopf fibrations.

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