%0 Journal Article %A Christopher Hacon %A Jakub Witaszek %T On the relative minimal model program for fourfolds in positive and mixed characteristic %J Forum of Mathematics, Pi %D 2023 %V 11 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1017/fmp.2023.6/ %R 10.1017/fmp.2023.6 %G en %F 10_1017_fmp_2023_6