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arXiv math/0008012math.GTmath.GR
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不通过余维1叶理的自同构作用的群

Groups that do not act by automorphisms of codimension-one foliations

Renato Feres, Dave Witte

摘要:

设G是一个有限生成群,具有这样的性质:G的任意有限指标子群的任意作用必有有限轨道. (By Ghys的一个定理,实秩至少为2的单李群中的格具有此性质。)设G通过余维为1的C_2叶理F的自同构作用在紧致流形M上。证明了若F有紧叶,则G的某个有限指数子群固定F的一个紧叶。进一步给出了G的某个有限指标子群固定F的每一叶的充分条件。

英文摘要:

Let G be a finitely generated group having the property that any action of any finite-index subgroup of G by homeomorphisms of the circle must have a finite orbit. (By a theorem of E.Ghys, lattices in simple Lie groups of real rank at least two have this property.) Suppose that such a G acts on a compact manifold M by automorphisms of a codimension-one C2 foliation, F. We show that if F has a compact leaf, then some finite-index subgroup of G fixes a compact leaf of F. Furthermore, we give sufficient conditions for some finite-index subgroup of G to fix each leaf of F.

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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