Proofgold Proof

pf
Let x0 of type ι be given. Let x1 of type ι be given. Let x2 of type ι → ι be given. Assume H0: explicit_Nats x0 x1 x2. Let x3 of type ι be given. Assume H1: prim1 x3 x0. Apply explicit_Nats_primrec_base with x0, x1, x2, x2 x3, λ x4 x5 . x2 x5. The subproof is completed by applying H0. ■