The algebra of Kleene stars of the plane and polylogarithms
  We extend the definition and study the algebraic properties of the polylogarithm Li(T), where T is rational series over the alphabet X = {x 0, x 1} belonging to suitable subalgebras of rational series. 
Ngoc Hoang (LIPN), G\'erard Duchamp (LIPN), Hoang Ngoc Minh (LIPN)
math.CO cs.SC math.AC