G-birational superrigidity of del Pezzo surfaces of degree 2 and 3

Published 15 Aug 2018 in math.AG | (1808.05023v1)

Abstract: Any minimal Del Pezzo G-surface S of degree smaller than 3 is G-birationally rigid. We classify those which are G-birationally superrigid and for those which fail to be so, we describe the equations of a set of generators for the infinite group of G-birational automorphisms.

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