2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/11550We estimate the 1--D power spectrum and the integral density of neighbors in 14 QSO lines of sight. We discuss their variation with respect to redshift and column density and compare the results with standard CDM models.2 pages, 1 ps figure. To appear in the Proceedings of the 13th IAP Colloquium on "Structure and Evolution of the IGM from QSO Absorption Lines", ed. P. Petitjean, S. Charlot, Paris July 1-5Astrophysicstext