Abstract:Nós fornecemos um exemplo de espaço topológico Tychonoff, almost-normal não normal e exploramos almost-normalidade restrita aos espaços de Isbell-Mrówka. Seguindo essa linha de estudo, estudamos almost disjoint families fortemente ℵ 0 -separadas comparando elas ao que se sabe sobre almost disjoint families normais e pseudonormais. Definimos uma nova família de conjuntos especiais de números reais relacionadas a esses problemas que chamamos de weak λ-sets. Esse estudo explora algumas questões de Paul Szeptycki … Show more
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