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arXiv 1107.3645math.GRcs.FLmath.LO
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从自动结构到自动组

From automatic structures to automatic groups

Olga Kharlampovich, Bakhadyr Khoussainov, Alexei Miasnikov

摘要:

本文引入了Cayley图自动群(CGA群或图自动群)的概念,它推广了标准的自动群概念。像通常的自动群一样,图自动群具有许多优良的性质:这些群在生成元的变化下是不变的,它们在直积和自由积、某些类型的合并积以及有限扩张下是封闭的。此外,图自动组中的字问题在二次时间内是可判定的。然而,图自动群的类别比自动群的类别广泛得多。例如,我们证明了所有的n-生成2-幂零群和Baumslag-Solitar群B(1,n)是图自动群,以及许多其他的亚交换群.

英文摘要:

In this paper we introduce the concept of a Cayley graph automatic group (CGA group or graph automatic group, for short) which generalizes the standard notion of an automatic group. Like the usual automatic groups graph automatic ones enjoy many nice properties: these group are invariant under the change of generators, they are closed under direct and free products, certain types of amalgamated products, and finite extensions. Furthermore, the Word Problem in graph automatic groups is decidable in quadratic time. However, the class of graph automatic groups is much wider then the class of automatic groups. For example, we prove that all finitely generated 2-nilpotent groups and Baumslag-Solitar groups B(1,n) are graph automatic, as well as many other metabelian groups.

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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