%0 Journal Article %A Brendle, Tara %A Margalit, Dan %T Normal subgroups of mapping class groups and the metaconjecture of Ivanov %J Journal of the American Mathematical Society %D 2019 %P 1009-1070 %V 32 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1090/jams/927/ %R 10.1090/jams/927 %F 10_1090_jams_927