Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Power-law multi-wave model for COVID-19 propagation in countries with
  nonuniform population density   The phenomenological mathematical model of COVID-19 spreading is proposed for
large countries with geographical differentiation of population density.
According to the model COVID-19 spreading takes the form of several
spatio-temporal waves developing almost independently and simultaneously in
areas with different population density. The intensity of each wave is
described by a power-law dependence. The parameters of dependence are
determined by real statistical data at the initial stage of the disease spread.
The results of the model simulation were verified using statistical data for
the Republic of Belarus. Based on the developed model, a forecast calculation
was made at the end of May, 2020. The accuracy of forecasting the total number
of cases for a period of 3 months in the proposed approach was about 3 percent.

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The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math