title: Comment on "Alternative approach to the solution of the dispersion relation for a generalized lattice Boltzmann equation".
abstract: Recently Reis and Phillips [Phys. Rev. E 77, 026702 (2008)] proposed a perturbative method to solve the dispersion equation derived from the linearized lattice Boltzmann equation. We will demonstrate that the method proposed by Reis and Phillips is a reinvention of an existing method. We would also like to refute a number of claims made by Reis and Phillips.
authors.affiliation: 54 rue Henri Barbusse, 75005 Paris Cedex, France. pierre.lal@free.fr
authors.forename: Pierre
authors.initials: P
authors.lastname: Lallemand
authors.forename: Li-Shi
authors.initials: LS
authors.lastname: Luo