2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/174639In this short note we study foliations with rationally connected leaves on surfaces. Our main result is that on surfaces there exists a polarisation such that the Harder-Narasimhan filtration of the tangent bundle with respect to this polarisation yields the maximal rationally quotient of the surface.8 pagesAlgebraic Geometrytext