Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An approximate threshold condition for non-autonomous system: an
  application to a vector-borne infection   An non-autonomous system is proposed to model the seasonal pattern of dengue
fever. We found that an approximate threshold condition for infection
persistence describes all possible behavior of the system. As far as we know,
the kind of analysis here proposed is entirely new. No precise mathematical
theorems are demonstrated but we give enough numerical evidence to support the
conclusions.

34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol