2 papers
math.AG2007
Non-annulation effective et positivité locale des fibrés en droites amples adjoints
Amaël Broustet
We prove that Seshadri constants of some ample divisors are bigger than 1 on smooth threefolds whose anticanonical bundle is nef or on Fano varieties of small coindice. The main to…
math.AG2006
Constantes de Seshadri du diviseur anticanonique des surfaces de del Pezzo
Amaël Broustet
We compute in this note the Seshadri constants of the anticanonical bundle at every point of Del Pezzo surfaces. During the proof, we enlight the role of rational curves in our com…