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.
logarithmic derivative dynkin operator free lie algebras rotabaxter algebra