2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58747Using the classical S.Lie method we obtain a complete description of infinitesimal symmetries of a holomorphic PDE system defining the Segre family of a real analytic hypersurface. This gives a new proof of some well known results of CR geometry.9 pages, LaTeXComplex Variables32Htext