Search for blocks/addresses/...
Proofgold Proof
pf
Let x0 of type
ι
be given.
Assume H0:
ordinal
x0
.
Apply andER with
TransSet
x0
,
∀ x1 .
x1
∈
x0
⟶
TransSet
x1
.
The subproof is completed by applying H0.
■