Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Boltzmann Diffusion of Two Gases   We study the Boltzmann equation for a mixture of two gases in one space
dimension with initial condition of one gas near vacuum and the other near a
Maxwellian equilibrium state. A qualitative-quantitative mathematical analysis
is developed to study this mass diffusion problem based on the Green's function
of the Boltzmann equation for the single species hard sphere collision model as
developed in work of Liu and Yu. The cross species resonance of the mass
diffusion and the diffusion-sound wave is investigated. An exponentially sharp
global solution is obtained.

11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
3
The categories of this paper are: physics
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph