Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Relativistic Fluid Ball as a Stratified Model of an Astrophysical
  Object   A relativistic fluid ball with an inhomogeneous static stratified matter
configuration is considered. A model of an astrophysical object with this
structure of matter is constructed.

29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th