Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Expansion of non-neutral, local equilibrium plasma   The nonlinear dynamics of collisionless non-neutral plasma without external
stabilizing factors is considered. Time-dependent one-particle distribution
functions of a Maxwellian type are obtained. The influence of initial
conditions on the entropy production is discussed.

1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph