Equivariant unirationality of del Pezzo surfaces of degree 3 and 4 (based on work of Alexander Duncan)

A variety $X$ with a faithful action of a finite group $G$ is called $G$-unirational, if there exists a faithful linear representation $V$ of $G$, and a $G$-equivariant dominant rational map $V \dashrightarrow X$. We prove a criterion of $G$-unirationality for del Pezzo surfaces of degree 3 or more.