2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39688The parton momentum density distributions of the proton were obtained from a NLO QCD analysis of HERA and fixed target structure function data. The resulting parton distribution set includes the full information on errors and correlations.Latex, 3 pages, 1 figure, needs sprocl.sty. Contribution to DIS2000, Liverpool UK, April 25-30, 2000High Energy Physics - PhenomenologyError propagation in QCD fitstext