Interval exchanges that do not occur in free groups

Interval exchanges that do not occur in free groups
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自由组中不发生的间隔交换

DOI:
10.4171/ggd/173
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发表时间:
2012
期刊:
Groups, Geometry, and Dynamics
影响因子:
--
通讯作者:
Christopher F. Novak
Christopher F. Novak
中科院分区:
--
文献类型:
--
作者:
Christopher F. Novak

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不相交旋转映射是单位区间上的区间交换变换(IET),它通过旋转作用于有限数量的不变子区间。目前尚不清楚所有IETs的E群是否拥有任何非阿贝尔自由子群。证明了不相交旋转映射不可能出现在与非阿贝尔自由群同构的E的子群上。数学学科分类(2010)。37时05分,54时15分,57时60分。
A disjoint rotation map is an interval exchange transformation (IET) on the unit interval that acts by rotation on a finite number of invariant subintervals. It is currently unknown whether the group E of all IETs possesses any non-abelian free subgroups. It is shown that it is not possible for a disjoint rotation map to occur in a subgroup of E that is isomorphic to a non-abelian free group. Mathematics Subject Classification (2010). 37E05, 54H15, 57M60.