Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Abelian Sandpile Model on an Infinite Tree   We consider the standard Abelian sandpile process on the Bethe lattice. We
show the existence of the thermodynamic limit for the finite volume stationary
measures and the existence of a unique infinite volume Markov process
exhibiting features of self-organized criticality.

7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn