2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71877It is observed that for complex surfaces, the positivity of the Ricci curvature is preserved by the Kähler-Ricci flow, under the additional assumption that the sum of the two lowest eigenvalues of the traceless curvature operator is non-negative.8 pages, LaTex fileDifferential GeometryAnalysis of PDEstext