Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universality in a class of fragmentation-coalescence processes   We introduce and analyse a class of fragmentation-coalescence processes
defined on finite systems of particles organised into clusters. Coalescent
events merge multiple clusters simultaneously to form a single larger cluster,
while fragmentation breaks up a cluster into a collection of singletons. Under
mild conditions on the coalescence rates, we show that the distribution of
cluster sizes becomes non- random in the thermodynamic limit. Moreover, we
discover that in the limit of small fragmentation rate these processes exhibit
self-organised criticality in the cluster size distribution, with universal
exponent 3/2.

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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex