G

G or g may refer to:
* Graham's number, a famous large number invented by Ronald Graham
* G function, a function by Jonathan Bowers, used as G(a) with the base of b
* Ackermann's Generalized Exponential Notation
** Joyce's More Generalized Exponential Notation, an extension of the above
* Graham Array Notation
* Slow-growing hierarchy, a certain hierarchy mapping ordinals \(\alpha\) to functions \(g_\alpha: \mathbb{N} \rightarrow \mathbb{N}\)
* G(n), the number of steps it takes for the Goodstein sequence starting on n to reach zero
* g(n), the weaker cousin of the Goodstein sequence
* The symbol for the SI prefix giga-
== See also ==
*Graham's number (disambiguation)
Category:Disambiguations