Abstract
An analysis is made of the triple collision integrals which appear in the expressions for the first density correction to the thermal conductivity and the viscosity of a gas of rigid spheres. It is shown that these triple collision integrals can be written as a sum of integrals associated with six triple collision events, each of which consists of a certain sequence of correlated successive binary collisions. A number of integrations are carried out, and the originally 15-fold triple collision integrals are reduced to 7-fold integrals in a form suitable for numerical analysis. The results are compared with the approximate predictions given by the Enskog theory for a dense gas of rigid spheres.