Even sets of four nodes on rational surfaces
Algebraic Geometry
2007-05-23 v1
Abstract
We describe smooth rational projective algebraic surfaces X, over an algebraically closed field of characteristic different from 2, having an even set of four disjoint (-2)-curves N_1,...,N_4, i.e. such that N_1+...+N_4 is divisible by 2 in Pic(X).
Cite
@article{arxiv.math/0407250,
title = {Even sets of four nodes on rational surfaces},
author = {Alberto Calabri and Ciro Ciliberto and Margarida Mendes Lopes},
journal= {arXiv preprint arXiv:math/0407250},
year = {2007}
}
Comments
9 pages