Equations used in kinetic theory. The Boltzmann equation is an example of a kinetic equation. An important application of kinetic equations is to calculate transport coefficients (and inverse transport coefficients), such as conductivity and viscosity in nonequilibrium statistical mechanics. In general, kinetic equations do not have exact solutions for interacting systems. If the system is near to equilibrium an approximation technique can be used by regarding the deviation from equilibrium as a perturbation.