2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/111717We discuss conjectures following from the attractor mechanism in type II string theory about the possible Chern classes of stable holomorphic vector bundles on Calabi-Yau threefolds. In particular, we give sufficient conditions for Chern classes to correspond to stable bundles.32 pages, LatexAlgebraic GeometryHigh Energy Physics - TheoryMathematical Physics14J81; 81T30text