Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low regularity solutions for the two-dimensional "rigid body +
  incompressible Euler" system   In this note we consider the motion of a solid body in a two dimensional
incompressible perfect fluid. We prove the global existence of solutions in the
case where the initial vorticity belongs to $L^p$ with $p>1$ and is compactly
supported. We do not assume that the energy is finite.

36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin