فهرست مطالب
International Journal of Group Theory
Volume:9 Issue: 2, Jun 2020
- تاریخ انتشار: 1398/12/28
- تعداد عناوین: 7
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Pages 69-80Fragile words have been already considered in the context of automata groups. Here we focus our attention on a special class of strongly fragile words that we call Catalan fragile words. Among other properties, we show that there exists a one-to-one correspondence between the set of Catalan fragile words and the set of full binary trees.Keywords: Automata group, Catalan number, Fragile word, Full binary tree
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Pages 81-94
The main result of our consideration is the proof of the centrally nilpotency of class two property for connected topological proper loops $L$ of dimension $le 3$ which have an at most six-dimensional solvable indecomposable Lie group as their multiplication group. This theorem is obtained from our previous classification by the investigation of six-dimensional indecomposable solvable multiplication Lie groups having a five-dimensional nilradical. We determine the Lie algebras of these multiplication groups and the subalgebras of the corresponding inner mapping groups.
Keywords: Multiplication group, inner mapping group of topological loops, topological transformation group, solvable Lie algebras, centrally nilpotent loops -
Pages 95-111We study an inverse problem of small doubling type. We investigate the structure of a finitely generated group $G$ such that, for any set $S$ of generators of $G$ of minimal order, we have $S^2 leq 3|S|-beta$, where $beta in {1, 2, 3}$Keywords: Small doubling, minimal generating subsets, inverse problems
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Pages 113-124We consider conditions on normalizers or centralizers in a group and we collect results showing how such conditions influence the structure of the group.Keywords: Centralizers, normalizers, finite p-groups, locally finite groups, locally nilpotent groups
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Pages 125-132
In this paper we analyse properties satisfied by certain open normal subgroups in normally constrained pro-p groups and in a spread version of normally constrained pro-p groups. In the case of powerful normally constrained pro-p groups, we exhibit some kind of inheritance properties in certain open normal subgroups.
Keywords: pro-p groups, open (closed) normal subgroups, waist, width, powerful -
Pages 133-138We give a brief survey of recent work on integral forms in vertex operator algebras (VOAs).Keywords: integral forms, vertex algebra, vertex operator algebra, Finite group, invariant