2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/150244We show that the limit points of (x,y) for all 3-folds in P^5 with the Chern ratios $x=c_1^3/c_1c_2$, $y=c_3/c_1c_2$ must lie on the line segment $x+y=2$, $1\le x\le 2$. (Note that the determinantal ones already give x+y=2, $1\le x\le 17/12$.)AMSTex, 7 pagesAlgebraic Geometrytext