On complex surfaces with 5 or 6 semistable singular fibers over P^1

Sheng-Li Tan, Yuping Tu, Alexis G. Zamora

Let $f:X@>>>{\mathbb{P}}^1$ be a fibered surface with fibers of genus g>1. If f is semistable and non isotrivial we prove that X of non negative Kodaira dimension implies that the number…