2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/105067The purpose of this note is to give a direct and self-contained proof of the Proportionality Theorem of Brasselet-Schwartz. This theorem relates the Schwartz indices of frames obtained by radial extension on Whitney stratified analytic spaces, with the obstructions to extending the canonical lifting of these frames as non-zero sections of the corresponding Nash bundle.Algebraic Geometry14C25, 32C25, 57R20text