Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Advection and autocatalysis as organizing principles for banded
  vegetation patterns   We motivate and analyze a simple model for the formation of banded vegetation
patterns. The model incorporates a minimal number of ingredients for vegetation
growth in semi-arid landscapes. It allows for comprehensive analysis and sheds
new light onto phenomena such as the migration of vegetation bands and the
interplay between their upper and lower edges. The key ingredient is the
formulation as a closed reaction-diffusion system, thus introducing a
conservation law that both allows for analysis and provides ready intuition and
understanding through analogies with characteristic speeds of propagation and
shock waves.

34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga