Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Almost Periodic Solutions and Global Attractors of Non-autonomous
  Navier-Stokes Equations   The article is devoted to the study of non-autonomous Navier-Stokes
equations. First, the authors have proved that such systems admit compact
global attractors. This problem is formulated and solved in the terms of
general non-autonomous dynamical systems. Second, they have obtained conditions
of convergence of non-autonomous Navier-Stokes equations. Third, a criterion
for the existence of almost periodic (quasi periodic,almost automorphic,
recurrent, pseudo recurrent) solutions of non-autonomous Navier-Stokes
equations is given. Finally, the authors have derived a global averaging
principle for non-autonomous Navier-Stokes equations.

33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th