Thin systems of generators of groups
A subset \(T\) of a group \(G\) with the identity \(e\) is called \(k\)-thin (\(k\in\mathbb{N}\)) if \(|A\cap gA|\leqslant k\), \(|A\cap Ag|\leqslant k\) for every \(g\in G\), \(g\ne e\). We show that every infinite group \(G\) can be generated by some 2-thin subset. Moreover, if \(G\) is either Ab...
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| Date: | 2018 |
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| Main Author: | |
| Format: | Article |
| Language: | English |
| Published: |
Lugansk National Taras Shevchenko University
2018
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| Subjects: | |
| Online Access: | https://admjournal.luguniv.edu.ua/index.php/adm/article/view/634 |
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| Journal Title: | Algebra and Discrete Mathematics |
Institution
Algebra and Discrete Mathematics| Summary: | A subset \(T\) of a group \(G\) with the identity \(e\) is called \(k\)-thin (\(k\in\mathbb{N}\)) if \(|A\cap gA|\leqslant k\), \(|A\cap Ag|\leqslant k\) for every \(g\in G\), \(g\ne e\). We show that every infinite group \(G\) can be generated by some 2-thin subset. Moreover, if \(G\) is either Abelian or a torsion group without elements of order 2, then there exists a 1-thin system of generators of \(G\). For every infinite group \(G\), there exist a 2-thin subset \(X\) such that \(G=XX^{-1}\cup X^{-1}X\), and a 4-thin subset \(Y\) such that \(G=YY^{-1}\). |
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