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Proofgold Proof
pf
Let x0 of type
ι
be given.
Assume H0:
Inj1
x0
∈
Sing
0
.
Apply Inj1NE1 with
x0
.
Apply SingE with
0
,
Inj1
x0
.
The subproof is completed by applying H0.
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