Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interactions and Correlations of Particulate Inclusions in a Columnar
  Phase   We calculate the elastic field mediated interaction between macroscopic
particles in a columnar hexagonal phase. The interaction is found to be
long-ranged and non-central, with both attractive and repulsive parts. We show
how the interaction modifies the particle correlations and the column
fluctuations. We also calculate the interaction of particles with the
topological defects of the columnar phase. The particle-defect interaction
reduces the mobility of the defects.

18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn