A population density process is constructed using approximately
$N\imath$ particles performing rate $N^2$ random walks between N cells
distributed on the unit interval. Particles give birth or die within cells, and
particle death rates are a function of the occupied cell population. With
suitable scaling, two possible limiting stochastic partial differential
equations are obtained. Both are nonlinear perturbations of the equation
satisfied by the density process of super Brownian motion.
@article{1039639357,
author = {Blount, Douglas},
title = {Diffusion limits for a nonlinear density dependent space-time
population model},
journal = {Ann. Probab.},
volume = {24},
number = {2},
year = {1996},
pages = { 639-659},
language = {en},
url = {http://dml.mathdoc.fr/item/1039639357}
}
Blount, Douglas. Diffusion limits for a nonlinear density dependent space-time
population model. Ann. Probab., Tome 24 (1996) no. 2, pp. 639-659. http://gdmltest.u-ga.fr/item/1039639357/