Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Local excitation-lateral inhibition interaction yields wave
  instabilities in spatial systems involving finite propagation delay   The work studies wave activity in spatial systems, which exhibit nonlocal
spatial interactions at the presence of a finite propagation speed. We find
analytically propagation delay-induced wave instabilities for various local
excitatory and lateral inhibitory spatial interactions. The final numerical
simulation confirms the analytical results.

30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph