Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of three-dimensional and two-dimensional statistical
  mechanics of shear layers for flow between two parallel plates   It is shown that the averaged velocity profiles predicted by statistical
mechanics of point vortices and statistical mechanics of vortex lines are
practically indistinguishable for a shear flow between two parallel walls.

16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio