Pro-p groups of positive deficiency

被引:7
作者
Hillman, Jonathan A. [1 ]
Schmidt, Alexander [2 ]
机构
[1] Univ Sydney, Sch Math & Stat, Sydney, NSW 2006, Australia
[2] Univ Regensburg, NWF I Math, D-93040 Regensburg, Germany
关键词
D O I
10.1112/blms/bdn089
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Let Gamma be a finitely presentable pro-p group with a nontrivial, finitely generated closed normal subgroup N of infinite index. Then def (Gamma) <= 1, and if def (Gamma) = 1 then Gamma is a pro-p duality group of dimension 2, N is a free pro-p group and Gamma/N is virtually free. In particular, if the centre of Gamma is nontrivial and def (Gamma) >= 1, then def (Gamma) = 1, cd G <= 2 and Gamma is virtually a direct product F x (p), with F a finitely generated free pro-p group.
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页码:1065 / 1069
页数:5
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