Martin Escardo and Paulo Oliva 2011
\begin{code}
{-# OPTIONS --safe --without-K #-}
module InfinitePigeon.Cantor where
open import InfinitePigeon.Logic
open import InfinitePigeon.Naturals
open import InfinitePigeon.Two
₂ℕ : Type
₂ℕ = ℕ → ₂
\end{code}