2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27735We show how the continuity equations expressing conservation of topological point or string defect charge can be used to determine the order-parameter correlation function for the phase-ordering kinetics of the O(n) model in the special case where the order parameter is constrained to be near a defect core. In this regime we find a self-consistent solution by assuming the order parameter is Gaussian. The resulting linear equation for the order-parameter correlation function has as its solution the Ohta-Jasnow-Kawasaki form.4 pages, REVTeX, submitted to Phys. Rev. LettCondensed Mattertext