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Cluster automorphism groups and automorphism groups of exchange graphs

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arxiv 1506.02029 v3 pith:WPWJXNVO submitted 2015-06-05 math.RT

classification math.RT
keywords mathcalautomorphismclustergroupstypeexchangefinitegroup
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abstract

For a coefficient free cluster algebra $\mathcal{A}$, we study the cluster automorphism group $Aut(\mathcal{A})$ and the automorphism group $Aut(E_{\mathcal{A}})$ of its exchange graph $E_{\mathcal{A}}$. We show that these two groups are isomorphic with each other, if $\mathcal{A}$ is of finite type excepting types of rank two and type $F_4$, or if $\mathcal{A}$ is of skew-symmetric finite mutation type.

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  1. A conjecture on cluster automorphisms of cluster algebras

    math.RT 2019-08 conditional novelty 7.0 of 10

    The paper proves that any Z-algebra homomorphism of a cluster algebra mapping one cluster to another is a cluster automorphism, confirming Chang-Schiffler's conjecture.

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