A discreteness criterion for subgroups of PU(2,1) with screw parabolic elements
A discreteness criterion for subgroups of PU(2,1) with screw parabolic elements
复制标题
具有螺旋抛物线单元的PU(2,1)子群的离散判据
DOI:
10.1016/j.jmaa.2014.06.010
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发表时间:
2014-12
影响因子:
1.3
通讯作者:
Xie,Baohua
中科院分区:
文献类型:
--
作者:
Ren,Xuejing;Wang,Miaokun;Xie,Baohua
We establish a discreteness criterion for Γ⊂ PU (2, 1) with a screw parabolic element g, which can be viewed as a generalization of Shimizu's lemma. Our method relies upon the geometry of Margulis region. It allows us to get rid of the restriction on rotation angle 2 π α of g in [4],[7]. Besides, an explicit region precisely invariant under the stabilizer of the fixed point of g in Γ is given.
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