2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/4640The cosmological implications from a new estimate of the local X-ray galaxy cluster abundance are summarized. The results are then compared to independent observations. It is suggested that `low' values for the mean cosmic matter density and the amplitude of mass density fluctuations currently do not appear unreasonable observationally.6 pages; to be published in the Proceedings of the Conference on Matter and Energy in Clusters of Galaxies, Chung-Li (2002), editors: S. Bowyer and C.-Y. Hwang; also available at http://www.reiprich.netAstrophysicstext