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Proofgold Proof
pf
Apply add_nat_SR with
1
,
0
,
λ x0 x1 .
x1
=
2
leaving 2 subgoals.
The subproof is completed by applying nat_0.
Apply add_nat_0R with
1
,
λ x0 x1 .
ordsucc
x1
=
2
.
Let x0 of type
ι
→
ι
→
ο
be given.
Assume H0:
x0
2
2
.
The subproof is completed by applying H0.
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