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Proofgold Proof
pf
Let x0 of type
ο
be given.
Assume H0:
∀ x1 .
and
(
x1
∈
omega
)
(
equip
0
x1
)
⟶
x0
.
Apply H0 with
0
.
Apply andI with
0
∈
omega
,
equip
0
0
leaving 2 subgoals.
Apply nat_p_omega with
0
.
The subproof is completed by applying nat_0.
The subproof is completed by applying equip_ref with
0
.
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