Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chaotic dynamics in the Volterra predator-prey model via linked twist
  maps   We prove the existence of infinitely many periodic solutions and complicated
dynamics, due to the presence of a topological horseshoe, for the classical
Volterra predator--prey model with a periodic harvesting. The proof relies on
some recent results about chaotic planar maps combined with the study of
geometric features which are typical of linked twist maps.

36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci