Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Delta shock wave formation in the case of triangular hyperbolic system
  of conservation laws   We describe $\delta$ shock wave arising from continuous initial data in the
case of triangular conservation law system arising from "generalized
pressureless gas dynamics model". We use the weak asymptotic method.

7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ