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Abstract

An exact markovian master equation for the smoothed classical distribution function f̄ = Mf is derived using the existence of the operator [1 + M(−1 + exp (-it L))]−1. It is shown that according to the information theory f̄0 = 0 (“initial random phase approximation”) should be taken. Then in the first order of a perturbation approach the master equation given by POMPE and VOSS can be derived in the long time approximation.