2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/191077We show that the occurrence of approximate pseudo-spin symmetry in nuclei is connected with certain similarities in the relativistic single-nucleon wave functions of the corresponding pseudo-spin doublets. We perform a case study in which several examples and the systematics of this connection are explored.LaTeX file (15 pages, 3 tables) and 9 PostScript figuresNuclear Theorytext