Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Oscillation and non oscillation criteria for linear nonhomogeneous
  systems of two first-order ordinary differential equations   The Riccati equation method is used to establish an oscillatory and a non
oscillatory criteria for nonhomogeneous linear systems of two first-order
ordinary differential equations. It is shown that the obtained oscillatory
criterion is a generalization of J. S. W. Wong's oscillatory criterion.

33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th