Kodaira type vanishing theorem for the Hirokado variety

Abstract

The Hirokado variety is a Calabi-Yau threefold in characteristic 3 that is not liftable either to characteristic~0 or the ring $W_2$ of the second Witt vectors. Although Deligne-Illusie-Raynaud type Kodaira vanishing cannot be applied, we show that $H^1(X,L^{-1})=0$, for an ample line bundle such that $L^3$ has a non-trivial global section, holds for this variety.

6 pages