2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/157200We show that a real rational (over $\C$) surfaces are quasi-simple, i.e., that such a surface is determined up to deformation in the class of real surfaces by the topological type of its real structure.A few references added, minor misprints corrected. 11 pages, AmS-TeXAlgebraic Geometry14J26, 14J10, and 14P25text