Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analog Schwarzschild-like geometry in fluids with external pressure   We study acoustic geometry in fluids with external pressure. In particular,
we examine the conditions under which the acoustic metric mimics a
Schwarzschild-like metric. We demonstrate that it is possible to mimic a
Schwarzschild-like geometry in a consistent way only in the framework of
relativistic acoustic geometry.

11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph