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Proofgold Proof

pf
Apply Inj0_pair_0_eq with λ x0 x1 : ι → ι . ∀ x2 x3 . x0 x3x2x3proj0 x2.
Let x0 of type ι be given.
Let x1 of type ι be given.
Assume H0: Inj0 x1x0.
Apply Unj_Inj0_eq with x1, λ x2 x3 . x2{Unj x4|x4 ∈ x0,∃ x5 . Inj0 x5 = x4}.
Apply ReplSepI with x0, λ x2 . ∃ x3 . Inj0 x3 = x2, Unj, Inj0 x1 leaving 2 subgoals.
The subproof is completed by applying H0.
Let x2 of type ο be given.
Assume H1: ∀ x3 . Inj0 x3 = Inj0 x1x2.
Apply H1 with x1.
Let x3 of type ιιο be given.
Assume H2: x3 (Inj0 x1) (Inj0 x1).
The subproof is completed by applying H2.