%0 Journal Article
%@ 1631-073X
%A Crimaldi, Irene
%A Letta, Giorgio
%A Pratelli, Luca
%D 2007
%F eprints:984
%I Elsevier Masson
%J Comptes rendus mathématique
%N 6
%P 341-344
%T Sur l'interversion de l'ordre entre deux opérations sur les tribus
%U http://eprints.imtlucca.it/984/
%V 345
%X We characterize the measurable spaces (Ω,A) such that, for each sub-σ-field G of A and each decreasing filtered family (F_t) of sub-σ-fields of A, with F_t ↓ F_∞, we have F_t ∨ G ↓ F_∞ ∨ G. It follows a characterization of the probability spaces (Ω, A, P) such that, for each sub-σ-field G of A and each decreasing sequence (F_n) of sub-σ-fields of A, with F_n ↓ F_∞, we have ⋂_n (F_n ∨ G) ∼ F_∞ ∨ G (mod P).