A Minkowski-style bound for the order of the finite subgroups of the Cremona group of rank 2 over an arbitrary field
Abstract
Description
Let 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.J
18 pages, submitted to Moscow Math.J