On the elliptic Kashiwara-Vergne Lie algebra

Abstract

We recall the definitions of two independently defined elliptic versions of the Kashiwara-Vergne Lie algebra $\mathfrak{krv}$, namely the Lie algebra ${\mathfrak{krv}}^{(1,1)}$ constructed by A.Alekseev, N.Kawazumi, Y.Kuno and F.Naef arising from the study of graded formality isomorphisms associated to topological fundamental groups of surfaces, and the Lie algebra ${\mathfrak{krv}}_{ell}$ defined using mould theoretic techniques arising from multiple zeta theory by E.Raphael and L.Schneps, and show that they coincide.