Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A steady Euler flow with compact support   A nontrivial smooth steady incompressible Euler flow in three dimensions with
compact support is constructed. Another uncommon property of this solution is
the dependence between the Bernoulli function and the pressure.

8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org