On Deficiency Gradient of Groups
On Deficiency Gradient of Groups
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关于群体的匮乏梯度
DOI:
10.1093/imrn/rnv149
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发表时间:
2016
影响因子:
1
通讯作者:
Kar A
中科院分区:
文献类型:
--
作者:
Kar A
Deficiency gradient is a higher dimensional analog of rank gradient. In this paper, we give a combinatorial proof that the fundamental group of a simply connected complex of amenable groups has deficiency gradient zero. We apply this to establish the vanishing of deficiency gradient in special linear groups over polynomial rings and number fields, and in Artin groups for which the nerve of the Coxeter matrix is simply connected. This implies that the first and second-Betti numbers vanish for these Artin groups without recourse to theconjecture. We propose a conjecture about the stabilization of deficiency gradient, which characterizes groups with 2-dimensional classifying spaces.Communicated by Marc Burger
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影响因子:
1
作者:
B. Eckmann
通讯作者:
B. Eckmann
DOI:
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发表时间:
1985
期刊:
影响因子:
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作者:
C. Hog;M. Lustig;W. Metzler
通讯作者:
W. Metzler
DOI:
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发表时间:
1972
期刊:
影响因子:
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作者:
J. Milnor
通讯作者:
J. Milnor
DOI:
10.4171/jems/344
发表时间:
2007-01
期刊:
arXiv: Group Theory
影响因子:
--
作者:
Miklós Abért;N. Nikolov
通讯作者:
Miklós Abért;N. Nikolov
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
Miklós Abért;A. Jaikin‐Zapirain;N. Nikolov
通讯作者:
N. Nikolov