Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι → ι be given.
Apply unknownprop_225064cd1bf1585f78cf88aa05e4877722b35dd1efb5b84c02c1437756d86856 with
λ x3 x4 : ι → ι → ο . x4 x0 x1.
Let x3 of type ο be given.
Assume H1:
∀ x4 : ι → ι . bij x0 x1 x4 ⟶ x3.
Apply H1 with
x2.
The subproof is completed by applying H0.