2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/68622We prove that the contact structures on Y= dX induced by non-homotopic Stein structures on the 4-manifold X have distinct Heegaard Floer invariants.15 pages, 7 figures; a minor mistake corrected, an appendix reviewing the Akbulut-Ozbagci construction of Lefschetz fibrations added, references updatedSymplectic Geometrytext