Nef cones of Hilbert schemes of points on surfaces

Barbara Bolognese, Jack Huizenga, Yinbang Lin, Eric Riedl, Benjamin Schmidt, Matthew Woolf, Xiaolei Zhao
2016 Algebra & Number Theory  
Let X be a smooth projective surface of irregularity 0. The Hilbert scheme of n points on X parameterizes zero-dimensional subschemes of X of length n. In this paper, we discuss general methods for studying the cone of ample divisors on the Hilbert scheme. We then use these techniques to compute the cone of ample divisors on the Hilbert scheme for several surfaces where the cone was previously unknown. Our examples include families of surfaces of general type and del Pezzo surfaces of degree 1.
more » ... The methods rely on Bridgeland stability and the Positivity Lemma of Bayer and Macri.
doi:10.2140/ant.2016.10.907 fatcat:hhmyjhi2aja3jgaqxo6xglrscy