Toward a conjecture of Tan and Tu on fibered general type surfaces

A. Huitrado-Mora, M. Castaneda-Salazar, A. G. Zamora

Given a semistable non-isotrivial fibered surface $f:X\to {\mathbb{P}}^1$ it was conjectured by Tan and Tu that if $X$ is of general type, then $f$ admits at least $7$ singular fiber…