Let x0 of type ι be given.
Apply SNoLev_0_eq_0 with
x0 leaving 2 subgoals.
Apply SNo_SNo with
0,
x0 leaving 2 subgoals.
The subproof is completed by applying ordinal_Empty.
The subproof is completed by applying H0.
Apply SNoLev_uniq2 with
0,
x0 leaving 2 subgoals.
The subproof is completed by applying ordinal_Empty.
The subproof is completed by applying H0.