2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46183Recent data on the structure function F_2(x,Q^2) at small values of x are analysed and compared with theoretical expectations. It is shown that the observed rise at small x is consistent with a logarithmic increase, growing logarithmically also with Q^2. A stronger increase, which may be incompatible with unitarity when extrapolated to asymptotically small values of x, cannot be inferred from present data.13 pages, 7 eps figures, uses epsfig.styHigh Energy Physics - Phenomenologytext