@article{eprints984,
           pages = {341--344},
            year = {2007},
          volume = {345},
           title = {Sur l'interversion de l'ordre entre deux op{\'e}rations sur les tribus},
          author = {Irene Crimaldi and Giorgio Letta and Luca Pratelli},
         journal = {Comptes rendus math{\'e}matique},
       publisher = {Elsevier Masson},
          number = {6},
             url = {http://eprints.imtlucca.it/984/},
        abstract = {We characterize the measurable spaces (?,A) such that, for each sub-{\ensuremath{\sigma}}-field G of A and each decreasing filtered family (F\_t) of sub-{\ensuremath{\sigma}}-fields of A, with F\_t ? F\_?, we have F\_t ? G ? F\_? ? G. It follows a characterization of the probability spaces (?, A, P) such that, for each sub-{\ensuremath{\sigma}}-field G of A and each decreasing sequence (F\_n) of sub-{\ensuremath{\sigma}}-fields of A, with F\_n ? F\_?, we have ?\_n (F\_n ? G) {$\sim$} F\_? ? G (mod P). }
}