2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58749The paper was withdrawn due to a gap in the proof of Lemma 3.Paper withdrawn due to a gap in the proof of Lemma 3Symplectic GeometryDifferential GeometryGeometric Topology53C15;57M50Some examples of aspherical symplectic four-manifoldstext