The tethracubor-by-deuteron is equal to E100#^^###100#^^###100 using Extended Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

Approximations in other notations

Notation Approximation
BEAF \(\{100,101(X \uparrow\uparrow\uparrow\uparrow X) 3\}\)[2] (weak bound)

\(\{100,101(X \uparrow\uparrow X^{3}) 3\}\) (strong bound)

Bird's array notation ???
Fast-growing hierarchy \(f_{{\varphi(3,0)} 2}(99)\)
Hardy hierarchy \(H_{{\varphi(3,0)}^2}(99)\)
Slow-growing hierarchy \(g_{\vartheta(\varphi(3,{\Omega 2}) 2)}(99)\)

Sources

  1. Saibian, Sbiis. 4.3.7 Extended Cascading-E Numbers Part IOne to Infinity. Retrieved 2017-03-14.
  2. Using particular notation \(\{a,b (X \uparrow\uparrow X) 2\}\) for \(X \uparrow\uparrow b\ \&\ a\)
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