Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Branching out   Results on the behaviour of the rightmost particle in the $n$th generation in
the branching random walk are reviewed and the phenomenon of anomalous
spreading speeds, noticed recently in related deterministic models, is
considered. The relationship between such results and certain coupled
reaction-diffusion equations is indicated.

26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom