aleph-null

[ ah-lif-nuhl ]

noun

, Mathematics.

1. the cardinal number of the set of all positive integers; the smallest transfinite cardinal number.

aleph-null

noun

1. the smallest infinite cardinal number; the cardinal number of the set of positive integers א0

aleph-null

/ ä′lĕf-nŭl′ /

1. The first of the transfinite cardinal numbers, corresponding to the number of elements in the set of positive integers.

Word History and Origins

Origin of aleph-null¹

First recorded in 1905–10