Martinelli, DilettaNaranjo del Val, Juan CarlosPirola, Gian Pietro2023-05-022023-05-022017-01-081615-715Xhttps://hdl.handle.net/2445/197426Let $X$ be an irreducible projective variety and let $f: X \rightarrow \mathbb{P}^n$ be a morphism. We give a new proof of the fact that the preimage of any linear variety of dimension $k \geq n+1-\operatorname{dim} f(X)$ is connected. We show that the statement is a consequence of the Generalized Hodge Index Theorem using easy numerical arguments that hold in any characteristic. We also prove the connectedness Theorem of Fulton and Hansen as an application of our main theorem.8 p.application/pdfeng(c) Walter de Gruyter, 2017Geometria algebraicaSuperfícies algebraiquesAlgebraic geometryAlgebraic surfacesinfo:eu-repo/semantics/article6473622023-05-02info:eu-repo/semantics/openAccess