Polar manifolds and actions

Polar manifolds and actions
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极性流形和动作

DOI:
10.1007/s11784-012-0087-y
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发表时间:
2012
影响因子:
1.8
通讯作者:
W. Ziller
W. Ziller
中科院分区:
数学3区
文献类型:
--
作者:
K. Grove;W. Ziller

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一个群作用称为极群,如果存在一个浸入子流形(一个截面)与所有轨道正交相交。在这一节中,我们展示了如何构造一个允许极群作用的流形,并通过沿着一个基本区域指定它的各向同性群。这推广了一个经典的concernity-one流形的建设。我们给出了许多例子,显示丰富的这一类群作用和相关的拓扑结构的部分的拓扑流形。
A group action is called polar if there exists an immersed submanifold (a section) which intersects all orbits orthogonally. We show how to construct a manifold admitting a polar group action by prescribing its isotropy groups along a fundamental domain in the section. This generalizes a classical construction for cohomogeneity-one manifolds.We give many examples showing the richness of this class of group actions and relate the topology of the section to the topology of the manifold.