2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47459Compact and well defined formulae for the shadow of the virtual photon interacting with a large nucleus at small $x_{Bj}$ are given in the QCD dipole picture. Two classes of contributions are considered: (a) quasi-elastic interaction of the $q\bar{q}$ dipole and (b) multi-pomeron coupling.17 pages Latex2e file, To be published in Acta Physica Polonica B, no. 3 (1998)High Energy Physics - Phenomenologytext