| pf |
|---|
Apply add_nat_SR with u9, 7, λ x0 x1 . x1 = u17 leaving 2 subgoals.
The subproof is completed by applying nat_7.
Apply add_nat_SR with u9, 6, λ x0 x1 . ordsucc x1 = u17 leaving 2 subgoals.
The subproof is completed by applying nat_6.
Apply add_nat_SR with u9, 5, λ x0 x1 . ordsucc (ordsucc x1) = u17 leaving 2 subgoals.
The subproof is completed by applying nat_5.
Apply add_nat_SR with u9, 4, λ x0 x1 . ordsucc (ordsucc (ordsucc x1)) = u17 leaving 2 subgoals.
The subproof is completed by applying nat_4.
■ |
|