Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Global Well-posedness of Strong Solutions to the 3D Primitive Equations
  with Horizontal Eddy Diffusivity   In this paper, we consider the initial-boundary value problem of the 3D
primitive equations for oceanic and atmospheric dynamics with only horizontal
diffusion in the temperature equation. Global well-posedness of strong
solutions are established with $H^2$ initial data.

1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ