Logarithmic Derivatives and Generalized Dynkin Operators
  Motivated by a recent surge of interest for Dynkin operators in mathematical physics and by problems in the combinatorial theory of dynamical systems, we propose here a systematic study of logarithmic derivatives in various contexts. In particular, we introduce and investigate generalizations of the Dynkin operator for which we obtain Magnus-type formulas. 
Frederic Menous, Fr\'ed\'eric Patras (JAD)
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