Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Velocity fluctuations of population fronts propagating into metastable
  states   The position of propagating population fronts fluctuates because of the
discreteness of the individuals and stochastic character of processes of birth,
death and migration. Here we consider a Markov model of a population front
propagating into a metastable state, and focus on the weak noise limit. For
typical, small fluctuations the front motion is diffusive, and we calculate the
front diffusion coefficient. We also determine the probability distribution of
rare, large fluctuations of the front position and, for a given average front
velocity, find the most likely population density profile of the front.
Implications of the theory for population extinction risk are briefly
considered.

27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph