TY - JOUR AU - Christopher Hacon AU - Jakub Witaszek TI - On the relative minimal model program for fourfolds in positive and mixed characteristic JO - Forum of Mathematics, Pi PY - 2023 VL - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1017/fmp.2023.6/ DO - 10.1017/fmp.2023.6 LA - en ID - 10_1017_fmp_2023_6 ER -