aleph-null

[ ah-lif-nuhl ]

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

Origin of aleph-null

1
First recorded in 1905–10
  • Also called a·leph-ze·ro [ah-lif-zeer-oh]. /ˈɑ lɪfˈzɪər oʊ/.

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British Dictionary definitions for aleph-null

aleph-null

noun
  1. the smallest infinite cardinal number; the cardinal number of the set of positive integers: Symbol: א 0

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for aleph-null

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.

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