On $G$-birational rigidity of del Pezzo surfacesArticle
Auteurs : Egor Yasinsky
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Egor Yasinsky
Let $G$ be a finite group and $H\subseteq G$ be its subgroup. We prove that
if a smooth del Pezzo surface over an algebraically closed field is
$H$-birationally rigid then it is also $G$-birationally rigid, answering a
geometric version of Kollár's question in dimension 2 by positive.