3 problems

Let $\mathfrak{r}^{\mathrm{ell}}$ be the elliptic Grothendieck–Teichmüller Lie algebra, let $\mathfrak{sl}_2$ be the degree-zero symplectic Lie algebra, and let $\delta_{2n}$,…

Let $\mathsf{GC}^{\text{loop}}_{(1)}$ denote the genus-one graph complex shown in the source, and let $\mathfrak b$ be the Lie subalgebra of…

For $n\geq0$, let $t_{2n}$ be the loop-free graph with $2n+2$ vertices described in the source, and let $\delta_{2n}\in\mathfrak{r}^{\mathrm{non-fr}}_{(1)}$ be Enriquez's derivatio…