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From Wiktionary, the free dictionary

U+2115, ℕ
DOUBLE-STRUCK CAPITAL N

[U+2114]
Letterlike Symbols
[U+2116]

Translingual

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Etymology

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The capital "N" is used this way in Formulario mathematico (1894) by Giuseppe Peano. The usage of blackboard bold dates to the 1960s.

Symbol

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  1. (mathematics) The set of natural numbers, which may either include zero or not.

Derived terms

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