Browsing by Author "Naranjo, J. C."
Barja Yáñez, Miguel Ángel; Naranjo, J. C. (1997)
Open AccessLet S be a fibred surface. We prove that the existence of morphisms from non countably many fibres to curves implies, up to base change, the existence of a rational map from S to another surface fibred over the same base ...
Barja Yáñez, Miguel Ángel; Naranjo, J. C.; Pirola, Gian Pietro (2005)
Open AccessWe study the topological index of some irregular surfaces that we call generalized Lagrangian. We show that under certain hypotheses on the base locus of the Lagrangian system the topological index is non-negative. For ...