Tests à la Hurewicz dans le plan

Dominique Lecomte (1)

1 IMJ - Institut de Mathématiques de Jussieu

We give, for some Borel sets of a product of two Polish spaces, including the Borel sets with countable sections, a Hurewicz-like characterization of those which cannot become a transfinite difference of open sets by changing the two Polish topologies.

Domaines: Logique [math.LO]; Topologie générale [math.GN]

Dominique Lecomte. Tests à la Hurewicz dans le plan. Fundamenta Mathematicae, 1998, 156, pp.131-165. ⟨hal-00175692⟩