Effect of a cutoff on pushed and bistable fronts of the reaction-diffusion equation.
We give an explicit formula for the change of speed of pushed and bistable fronts of the reaction-diffusion equation when a small cutoff is applied to the reaction term at the unstable or metastable equilibrium point. The results are valid for arbitrary reaction terms and include the case of density-dependent diffusion.
Benguria
R D
RD
Departamento de Física, Pontificia Universidad Católica de Chile Casilla 306, Santiago 22, Chile.
Depassier
M C
MC
Haikala
V
V