2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/65183The core of a projective dimension one module is computed explicitly in terms of Fitting ideals. In particular, our formula recovers previous work by R. Mohan on integrally closed torsionfree modules over a two-dimensional regular local ring.7 pages, to appear in Manu. MathCommutative Algebratext