# bidouble

## English

### Etymology

bidouble (not comparable)

1. (mathematics) Acting as a finite flat Galois morphism with Galois group (Z/2)²-.
• 2016, Alice Garbagnati, “Smooth double covers of K3 surfaces”, in arXiv[1]:
We give explicit examples of surfaces ${\displaystyle X}$ with Kodaira dimension 1 and 2 obtained as double cover of K3 surfaces and we describe some of them as bidouble cover of rational surfaces.