Aleph0

Aleph0

Aleph-zéro

Cet article court présente un sujet plus amplement développé ici : Aleph (nombre) et Ensemble dénombrable.

Le cardinal de l'ensemble des entiers naturels, et donc par équipotence, le cardinal de n'importe quel ensemble dénombrable, est noté \aleph_0 et se lit Aleph-zéro, c'est le premier dans la suite indexée par les ordinaux des alephs, une suite d'ordinaux définie par Georg Cantor pour représenter tous les cardinaux infinis.

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