Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite-time collapse and soliton-like states in the dynamics of
  dissipative gases   A study of the gas dynamics of a dilute collection of the inelastically
colliding hard spheres is presented. When diffusive processes are neglected the
gas density blows up in a finite time. The blowup is the mathematical
expression for one of the possible mechanisms for cluster formation in
dissipative gases. The way diffusive processes smoothen the singularity has
been studied. Exact localized soliton-type solutions of the gas dynamics when
heat diffusion balances non-linear cooling are obtained. The presented results
generalize previous findings for planar flows.

9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc