MOS

Abstract

We show that the universal plane curve M of degree d may be seen as a space of isomorphism classes of certain 1-dimensional coherent sheaves on the projective plane. The universal singular locus M' of M coincides with the subvariety of M consisting of sheaves that are not locally free on their support. It turns out that the blow up of M along M' may be naturally seen as a compactification of M_B=M\M' by vector bundles (on support).