Every orientable Seifert 3-manifold is a real component of a uniruled algebraic variety
arXiv:math/0303167 · doi:10.1016/j.top.2004.03.003
Abstract
We show that any orientable Seifert 3-manifold is diffeomorphic to a connected component of the set of real points of a uniruled real algebraic variety, and prove a conjecture of János Kollár.