The xappolplex is equal to {10,xappol (2) 2} in BEAF.[1] The term was coined by Jonathan Bowers. It is also equal to {10,3,2 (2) 2}.


Notation Approximation
Bird's array notation \(\{10,\text{xappol} [3] 2\}\)
Cascading-E notation \(E10\#\text{^}\#\#10\#2\)
Hyperfactorial Array Notation \((10![1,[1,1,3],1,2])![1,[1,1,3],1,2]\)
Fast-growing hierarchy \(f_{\omega^{\omega^2}}(f_{\omega^{\omega^2}}(10))\)
Hardy hierarchy \(H_{\omega^{\omega^{\omega^2}} 2}(10)\)
Slow-growing hierarchy \(g_{\vartheta(\Omega^{\Omega\vartheta(\Omega^{\Omega\omega})})}(10)\)


  1. Bowers, JonathanInfinity Scrapers. Retrieved January 2013.

See also

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