Arhangelskii, A.V.Bella, Angelo2017-06-162017-06-162007-10-011576-9402https://riunet.upv.es/handle/10251/83066[EN] We discuss some properties stronger than Gδ-diagonal. Among other things, we prove that any first countable paratopological group has a Gδ-diagonal of infinite rank and hence also a regular Gδ-diagonal. This answer a question recently asked by Arhangel’skii and Burke.Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)Gδ-diagonal of rank nSemitopological and paratopological groupsSouslin numberSubmetrizabilityThe diagonal of a first countable paratopological group, submetrizability, and related resultsArtículo2017-06-1610.4995/agt.2007.1881Abierto1989-4147