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Proofgold Proof

pf
Let x0 of type ι be given.
Assume H0: x0omega.
Apply ordinal_ordsucc_SNo_eq with mul_SNo 2 x0, λ x1 x2 . odd_nat x1 leaving 2 subgoals.
Apply nat_p_ordinal with mul_SNo 2 x0.
Apply omega_nat_p with mul_SNo 2 x0.
Apply mul_SNo_In_omega with 2, x0 leaving 2 subgoals.
Apply nat_p_omega with 2.
The subproof is completed by applying nat_2.
The subproof is completed by applying H0.
Apply even_nat_odd_nat_S with mul_SNo 2 x0.
Apply even_nat_2x with x0.
The subproof is completed by applying H0.