Big Torelli groups: generation and commensuration

Javier Aramayona, Tyrone Ghaswala, Autumn E. Kent +3

For any surface $\Sigma$ of infinite topological type, we study the Torelli subgroup $\mathcal{I}(\Sigma )$ of the mapping class group $\mathrm{MCG}(\Sigma )$, whose elements are those mapping classe…