2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/271We study the scheme of multi-jumping lines of an $n$-instanton bundle mainly for $n\leq 5$. We apply it to prove the irreducibility and smoothness of the moduli space of 5-instanton. Some particular situations with higher $c_2$ are also studied.Latex, 49 pagesAlgebraic Geometry14J60text