Resumen de On invariant rank two vector bundles on P 2

Simone Marchesi, Jean Vallès

• In this paper we characterize the rank two vector bundles on P 2 which are invariant under the actions of the parabolic subgroups Gp := Stabp(PGL(3)) fixing a point in the projective plane, GL := StabL(PGL(3)) fixing a line, and when p ∈ L, the Borel subgroup B = Gp∩GL of PGL(3). Moreover, we prove that the geometrical configuration of the jumping locus induced by the invariance does not, on the other hand, characterize the invariance itself. Indeed, we find infinite families that are almost uniform but not almost homogeneous