2 papers
math.AG2005
Explicit Noether-Lefschetz for arbitrary threefolds
Angelo Felice Lopez, Catriona Maclean
We study the Noether-Lefschetz locus of a very ample line bundle L on an arbitrary smooth threefold Y. Building on results of Green, Voisin and Otwinowska, we give explicit bounds,…
math.AG2001
On the irreducibility of secant cones, and an application to linear normality
Angelo Lopez, Ziv Ran
Let be a normal nondegenerate m-dimensional subvariety and let denote the maximum dimension of a subvariety such that contains a g…