Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cluster automorphism groups and automorphism groups of exchange graphs   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.

36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat