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The tethrato-tethrathoth (also called tethrarxitri) is equal to E100#^^#^^#100 in Extended Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

EtymologyEdit

The name "tethrato-tethrathoth" is based on the "tethrato-" operator and tethrathoth.

The name "tethrarxitri" is based on the number tethrathoth, "arx-" meaning "citadel" in Latin, and "tri" meaning three.

Approximations in other notations Edit

Notation Approximation
BEAF \(\{X,X,X \uparrow\uparrow X\}\ \&\ 100\)
Bird's array notation \(\{100,101 [1 [1 \backslash 2 \neg 2] 2] 2\}\)
Hyperfactorial array notation \(100![1] w/[1,1,1,1,1,1,2]\)
Fast-growing hierarchy \(f_{\varphi(\varepsilon_0,0)}(99)\)
Hardy hierarchy \(H_{\varphi(\varepsilon_0,0)}(100)\)
Slow-growing hierarchy \(g_{\vartheta(\vartheta_1(\varepsilon_{\Omega+1}))}(100)\)

SourcesEdit

  1. Saibian, Sbiis. 4.3.3 - Forging Extended Cascading-E Numbers Part I. Retrieved May 18, 2014.

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