Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ordered clusters and dynamical states of particles in a vibrated fluid   Fluid-mediated interactions between particles in a vibrating fluid lead to
both long range attraction and short range repulsion. The resulting patterns
include hexagonally ordered micro-crystallites, time-periodic structures, and
chaotic fluctuating patterns with complex dynamics. A model based on streaming
flow gives a good quantitative account of the attractive part of the
interaction.

27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph