Hodge Structures of K3 type of bidouble covers of rational surfaces

Alice Garbagnati, Matteo Penegini

A bidouble cover is a flat $G:={\left(\mathbb{Z}/2\mathbb{Z}\right)}^2$-Galois cover $X\to Y$. In this situation there exist three intermediate quotients $Y_1,Y_2$ and $Y_3$…