A Gaschütz Lemma for linear algebraic groups with applications to the Riemann-Hilbert correspondence

Jason Bell, Michael Wibmer

The classical Gaschütz Lemma states that for a surjective morphism $G\to H$ of finite groups, generators $h_1,\dots ,h_d$ of $H$ can be lifted to generators $g_1,\dots ,g_d$ of $G$…