2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90338We outline an approach that streamlines considerably the construction and analysis of well-behaved nonlinear quantum dynamics, with completely positive extensions to entangled systems. A few notes are added on the issue of quantum measurements under a nonlinear dynamics.Revtex4, 12 pgs.; submitted to Phys.Lett.A. This is an expanded version of Sec.4 in quant-ph/0203153, with material added on complete positivity/locality/separability and measurement issues for nonlinear dynamicsQuantum Physicstext