Catching small sets under Flows
نویسندگان
چکیده
Two results are established concerning the ability of a set to cover any element of a class of sets under the action of an ergodic flow. The classes considered are the class of countable sets and the class of sets of measure zero. RESUME. Deux résultats sont demontres concernant la possibilité pour un ensemble de recouvrir, sous l’action d’un flot ergodique, tous les elements d’une classe d’ensembles. Les classes considerees sont la classe des ensembles denombrables et la classe des ensembles de mesure zero.
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