title: Effect of a cutoff on pushed and bistable fronts of the reaction-diffusion equation.
abstract: 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.
authors.affiliation: Departamento de Física, Pontificia Universidad Católica de Chile Casilla 306, Santiago 22, Chile.
authors.forename: R D
authors.initials: RD
authors.lastname: Benguria
authors.forename: M C
authors.initials: MC
authors.lastname: Depassier
authors.forename: V
authors.initials: V
authors.lastname: Haikala