Two-generator one-relator groups and marked polytopes

Two-generator one-relator groups and marked polytopes
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两生成元一相关群和标记多胞体

DOI:
10.5802/aif.3325
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发表时间:
2015
期刊:
Annales de l'Institut Fourier
影响因子:
--
通讯作者:
Stephan Tillmann
Stephan Tillmann
中科院分区:
--
文献类型:
--
作者:
Stefan Friedl;Stephan Tillmann

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我们使用Fox演算将标记多面体分配给具有两个生成器和一个相关器的“漂亮”组演示。将标记顶点与Novikov-Sikorav同调联系起来,证明它们决定了群的Bieri-Neumann-Strebel不变量。此外,我们表明,在许多情况下,标记多面体是基础群的不变量,并且在这些情况下,标记多面体也决定了所有相关hnn分裂的最小复杂性。
We use Fox calculus to assign a marked polytope to a `nice' group presentation with two generators and one relator. Relating the marked vertices to Novikov-Sikorav homology we show that they determine the Bieri-Neumann-Strebel invariant of the group. Furthermore we show that in many cases the marked polytope is an invariant of the underlying group and that in those cases the marked polytope also determines the minimal complexity of all the associated HNN-splittings.
无循环群的 McMullen 多项式和 Lipschitz 流
DOI: 10.4171/jems/739
发表时间: 2017
影响因子: 2.6
作者:
Dowdall, Spencer;Kapovich, Ilya;Leininger, Christopher
通讯作者: Leininger, Christopher