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Proofgold Proof
pf
Let x0 of type
ι
be given.
Assume H0:
nat_p
x0
.
Apply mul_nat_com with
1
,
x0
,
λ x1 x2 .
x2
=
x0
leaving 3 subgoals.
The subproof is completed by applying nat_1.
The subproof is completed by applying H0.
The subproof is completed by applying mul_nat_1R with
x0
.
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