A Minkowski-style bound for the order of the finite subgroups of the Cremona group of rank 2 over an arbitrary field

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/222135Let Cr(k) be the Cremona group of rank 2 over a field k, i.e. the group of all k-automorphisms of k(X,Y). We determine the l.c.m. of the orders of the finite subgroups of Cr(k) of order prime to the characteristic of k.18 pages, submitted to Moscow Math.JAlgebraic Geometry14E07A Minkowski-style bound for the order of the finite subgroups of the Cremona group of rank 2 over an arbitrary fieldtext