2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74954Giroux has described a correspondence between open book decompositions on a 3--manifold and contact structures. In this paper we use Heegaard Floer homology to give restrictions on contact structures which correspond to open book decompositions with planar pages, generalizing a recent result of Etnyre.17 pages, 4 figuresSymplectic GeometryGeometric Topologytext