NN
Robert P. Munafo, 2023 Jul 19.
math. The symbol ℕ (called "double-struck capital N") is used to refer to the natural numbers (positive integers). In situations where symbols are not available, it is sometimes written "NN". (See also CC, QQ, RR, ZZ)
From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 1987-2024.
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This page was written in the "embarrassingly readable" markup language RHTF, and was last updated on 2023 Jul 20.
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