37 citations · 56 across the 11 of their papers we have counts for
3 papers · 1 filter
On the quadratic normality and the triple curve of three dimensional subvarieties of
Pietro De Poi, Emilia Mezzetti, José Carlos Sierra
A well-known conjecture asserts that smooth threefolds $X\subset\{\mathbb P}^5$ are quadratically normal with the only exception of the Palatini scroll. As a corollary of a more ge…
On the extendability of elliptic surfaces of rank two and higher
Angelo Felice Lopez, Roberto Munoz, Jose' Carlos Sierra
We study threefolds X in a projective space having as hyperplane section a smooth surface with an elliptic fibration. We first give a general theorem about the possible embeddings…
A degree bound for globally generated vector bundles
José Carlos Sierra
We obtain a sharp bound on the degree of a globally generated vector bundle over a reduced irreducible projective variety defined over an algebraically closed field of characterist…