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arXiv · 2605.16854

Are cluster automorphism groups finitely generated?

Changjian Fu·Zhanhong Liang·Yinzhi Wang
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Abstract

This paper investigates the finite generation of cluster automorphism groups. By applying the pseudo $\mathbb{N}$-grading introduced in our previous work, we establish a sufficient condition for a cluster automorphism group to be finitely generated. As applications, we re-establish the finite generation of the automorphism groups for all finite mutation type cluster algebras, and verify the acyclic cases. Furthermore, we illustrate through examples that our approach significantly simplifies the computation of presentations for these groups in certain cases.

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Changjian Fu, Zhanhong Liang, Yinzhi Wang. 2026-05-16. Are cluster automorphism groups finitely generated?. https://arxiv.org/abs/2605.16854

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