We will prove ordinal Sbar_Omega.
We prove the intermediate claim Hord: ordinal S_Omega.
An exact proof term for the current goal is (andEL (ordinal S_Omega) (uncountable_set S_Omega) S_Omega_ordinal_uncountable).
rewrite the current goal using Sbar_Omega_eq_ordsucc (from left to right).
An exact proof term for the current goal is (ordinal_ordsucc S_Omega Hord).