| pf |
|---|
Apply add_nat_SR with u20, 3, λ x0 x1 . x1 = u24 leaving 2 subgoals.
The subproof is completed by applying nat_3.
Apply add_nat_SR with u20, 2, λ x0 x1 . ordsucc x1 = u24 leaving 2 subgoals.
The subproof is completed by applying nat_2.
Apply add_nat_SR with u20, 1, λ x0 x1 . ordsucc (ordsucc x1) = u24 leaving 2 subgoals.
The subproof is completed by applying nat_1.
Apply add_nat_SR with u20, 0, λ x0 x1 . ordsucc (ordsucc (ordsucc x1)) = u24 leaving 2 subgoals.
The subproof is completed by applying nat_0.
■ |
|