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Enneation

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Enneation or nonation refers to the 9th hyperoperation starting from addition. It is equal to \(a \uparrow^{7}b\) in Knuth's up-arrow notation.[1]

Enneation can be written in array notation as \(\{a,b,7\}\), in chained arrow notation as \(a \rightarrow b \rightarrow 7\) and in Hyper-E notation as E(a)1#1#1#1#1#1#b.

Enneational growth rate is equivalent to \(f_8(n)\) in the fast-growing hierarchy.

Sources Edit

  1. Enneation on Net Helper

See Also Edit

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