2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47849High energy factorization predictions for F2c are derived using BFKL resummations of leading logs for the proton structure functions at HERA. A theoretical non-perturbative uncertainty on the factorization scheme is taken into account by considering two different approaches for modelling the proton. The parameters are fixed by a fit of F2 at small x. The resulting predictions for F2c are in agreement with the data within the present error bars.4 pages, latex + 1 eps figure. Talk presented at the DIS98 workshop, Brussels, April 1998High Energy Physics - Phenomenologytext