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arXiv · 2307.05526

Bounded generation of Steinberg groups over Dedekind rings of arithmetic type

Boris Kunyavskii·Andrei Lavrenov·Eugene Plotkin·Nikolai Vavilov
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Abstract

The main result of the present paper is bounded elementary generation of the Steinberg groups $\mathrm{St}(\Phi,R)$ for simply laced root systems $\Phi$ of rank $\ge 2$ and arbitrary Dedekind rings of arithmetic type. Also, we prove bounded generation of $\mathrm{St}(\Phi,\mathbb F_{q}[t,\,t^{-1}])$ for all root systems $\Phi$, and bounded generation of $\mathrm{St}(\Phi,\mathbb F_{q}[t])$ for all root systems $\Phi\neq\mathsf A_1$. The proofs are based on a theorem on bounded elementary generation for the corresponding Chevalley groups, where we provide uniform bounds.

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Boris Kunyavskii, Andrei Lavrenov, Eugene Plotkin, Nikolai Vavilov. 2023-07-07. Bounded generation of Steinberg groups over Dedekind rings of arithmetic type. https://arxiv.org/abs/2307.05526

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