51Թ

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

“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

aleph-null

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

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51Թ History and Origins

Origin of aleph-null1

First recorded in 1905–10

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