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arXiv 0711.3440math.GR
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多环群的生成

Generation of polycyclic groups

Martin Kassabov, Nikolay Nikolov

摘要:

本文给出了Linnell和Warhurst的一个定理的另一种证明:多环群G的生成元个数d(G)至多为d(\hat G),其中d(\hat G)是G的profinite完备化的生成元个数.虽然没有提出任何新的主张,但我们认为我们的论点比原来的论点简单得多。此外,我们的结果给出了d(G)=d(\hat G)的一些充分条件,这些条件在G是虚交换的情况下很容易得到验证.

英文摘要:

In this note we give an alternative proof of a theorem of Linnell and Warhurst that the number of generators d(G) of a polycyclic group G is at most d(\hat G), where d(\hat G) is the number of generators of the profinite completion of G. While not claiming anything new we believe that our argument is much simpler that the original one. Moreover our result gives some sufficient condition when d(G)=d(\hat G) which can be verified quite easily in the case when G is virtually abelian.

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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