Motivic coaction and single-valued map of polylogarithms from zeta generators

Authors: Hadleigh Frost, Martijn Hidding, Deepak Kamlesh, Carlos Rodriguez, Oliver Schlotterer and Bram Verbeek

Preprint number: UUITP-36/23

We introduce a new Lie-algebraic approach to explicitly construct the motivic coaction and single-valued map of multiple polylogarithms in any number of variables. In both cases, the appearance of multiple zeta values is controlled by conjugating generating series of polylogarithms with Lie-algebra generators associated with odd zeta values. Our reformulation of earlier constructions of coactions and single-valued polylogarithms preserves choices of fibration bases, exposes the correlation between multiple zeta values of different depths and paves the way for generalizations beyond genus zero.