Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A non-standard numerical scheme for an age-of-infection epidemic model   We propose a numerical method for approximating integro-differential
equations arising in age-of-infection epidemic models. The method is based on a
non-standard finite differences approximation of the integral term appearing in
the equation. The study of convergence properties and the analysis of the
qualitative behavior of the numerical solution show that it preserves all the
basic properties of the continuous model with no restrictive conditions on the
step-length $h$ of integration and that it recovers the continuous dynamic as
$h$ tends to zero.

12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph