Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Habitat fragmentation: the possibility of a patch disrupting its
  neighbor   This paper starts from the Fisher-Kolmogorov-Petrovskii-Piskunov equation to
model diffusive populations. The main result, according to this model, is that
two connected patches in a system do not always contribute to each other.
Specifically, inserting a large fragment next to a small one is always positive
for life inside the small patch, while inserting a very small patch next to a
large one can be negative for life inside the large fragment. This result,
obtained to homogeneously fragmented regions, is possible from the general case
expression for the minimum sizes in a system of two patches. This expression by
itself is an interesting result, because it allows the study of other
characteristics not included in the present work.

9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas