Mark Semenovich Pinsker wrote about maximal partition with zero entropy in a theory of dynamical systems paper, in addition to this, he also invented Pinsker's inequality (the total variation distance bounded by an inequality in terms of the KullbackLeibler divergence).
His accomplishments included a classic paper on the entropy theory of dynamical systems which introduced the maximal partition with zero entropy, later known as Pinsker's partition. In information theory, Pinsker's inequality, named after its inventor Mark Semenovich Pinsker, is an inequality that bounds the total variation distance (or statistical distance) in terms of the KullbackLeibler divergence. 
