Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι → ι be given.
Let x3 of type ι be given.
Let x4 of type ι → ι → ι be given.
Let x5 of type ι be given.
Assume H1: x5 ∈ x0.
Apply Eps_i_ex with
c3e2e.. x0 x1 x2 x3 x4 x5.
Apply unknownprop_f4957c6c8fd18fac2fb0b1d8e4e76acd033ec5e8e3d225d6663f62ada99582b4 with
x0,
x1,
x2,
x3,
x4,
x5 leaving 2 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.