Abstract
The full Boltzmann collision operator with an infinite collision cross section is investigated. It is shown that in the general case the operator is bilinear in F and ∂F/∂ξ and three different representations of it are given. The linearized collision operator is further explored and a new expression for the kernel in the form of a divergence is obtained. An approximation to the linearized operator is indicated, which may prove of value in numerical calculations.
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