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An Equiduoxal is 10(≡≡) = 10(10(≡))(10(≡)) using Dual Percoxy Notation.[1] This means that the number is equal to a power tower of Equinoxal 10's with Equinoxal at the top. The term was coined by Matthew Tainsh in 2016.

## Etymology

The name of this number is based on Equinoxal and "du", because the two subscripts are equal to an Equinoxal.

## Approximations in other notations

Notation Approximation
Arrow notation \(10 \uparrow\uparrow (10 \uparrow\uparrow 11)\)

## Sources

1. Dual Percoxy Notation – Mathematical Axiom