Assuming a spatially homogenous gas of point particles with unit mass described by f ( v , t ) , one may define a corrected potential for Coulomb interactions, U ^ ^ i j = U i j exp ⁡ ⁡ ( − − r i j r D ) , where U i j is the Coulomb potential, U i j = e i e j | x i − − x j | , and r D is the Debye radius. The potential U i j ^ ^ is then plugged it into the Boltzmann collision integral (the collision term of the Boltzmann equation) and solved for the main asymptotic term in the limit r D → → ∞ ∞ .