Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A solution to the evolution-related Truscott-Brindley model for the
  generalized phytoplankton-zooplankton populations   Phytoplankton are tiny floating plants (algae) living in oceans. In the
process of photosynthesis, phytoplankton produces half of the world's oxygen.
Moreover, by primary production, death and sinking, they transport carbon from
the ocean's surface layer to marine sediments. There are many species of
phytoplankton that can be distinguished according to morphology.
  In this paper, we investigate the generalised Truscott-Brindley model of the
dynamics of zoologically defined interacting populations which have spatial
structure. Specifically, we consider conjointly marine phytoplankton and
zooplankton populations, and model them as an excitable medium. The resolution
using the Boubaker polynomials expansion scheme (BPES) along with stability
analysis is carried out.

7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs