Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Godunov Method for a 2-Phase Model   We consider the Godunov numerical method to the phase-transition traffic
model, proposed in [6], by Colombo, Marcellini, and Rascle. Numerical tests are
shown to prove the validity of the method. Moreover we highlight the
differences between such model and the one proposed in [1], by Blandin, Work,
Goatin, Piccoli, and Bayen.

23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph