Departament de Matemàtica Aplicada I, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Spain
Abstract:
Let be a bielliptic fibration. We prove is, up to base change, a rational double cover of an elliptic fibration and that is isotrivial provided it is smooth. Finally, we prove that the slope of is at least four provided the genus of the fibre is at least six.