Fujita's conjecture for quasi-elliptic surfaces

Abstract

We show that Fujita's conjecture is true for quasi-elliptic surfaces. Explicitly, for any quasi-elliptic surface $X$ and an ample line bundle $A$ on $X$, we have $K_X+tA$ is base point free for $t\ge 3$ and is very ample for $t\ge 4$.

10 pages. Final version