2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/225180Given two nonsingular real algebraic varieties V and W, we consider the problem of deciding whether a smooth map f: V -> W can be approximated by regular maps in the space of smooth maps from V to W. Our main result is a complete solution to this problem in case W is the usual 2-dimensional sphere and V is a real algebraic surface of negative Kodaira dimension.11 pagesAlgebraic Geometry14P05 14P25 14J26text