The rank gradient from a combinatorial viewpoint
The rank gradient from a combinatorial viewpoint
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从组合的角度来看排名梯度
DOI:
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发表时间:
2007
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通讯作者:
N. Nikolov
中科院分区:
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作者:
Miklós Abért;A. Jaikin‐Zapirain;N. Nikolov
This paper investigates the asymptotic behaviour of the minimal number of generators of finite index subgroups in residually finite groups. We analyze three natural classes of groups: amenable groups, groups possessing an infinite soluble normal subgroup and virtually free groups. As a tool for the amenable case we generalize Lackenby’s trichotomy theorem on finitely presented groups.