<i>OE</i>and<i>W</i>* superrigidity results for actions by surface braid groups
<i>OE</i>and<i>W</i>* superrigidity results for actions by surface braid groups
We show that several important normal subgroups Γ of the mapping class group of a surface satisfy the following property: any free, ergodic, probability measure-preserving action Γ ↷ X is stably O E -superrigid. These include the central quotients of most surface braid groups and most Torelli groups and Johnson …