2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/173110We show the dominance of the restriction map from a moduli space of stable sheaves on the projective plane to the Coble quartic. With the dominance and the interpretation of a stable sheaf on the plane in terms of the hyperplane arrangements, we expect to investigate the geometry of the Coble quartic.11 pages, Remark 3.5 added, the title changedAlgebraic Geometrytext