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Proofgold Proof

pf
Let x0 of type ι be given.
Assume H0: TransSet x0.
Assume H1: ZF_closed x0.
Let x1 of type ι be given.
Assume H2: x1x0.
Let x2 of type ι be given.
Assume H3: x2x0.
Apply unknownprop_6323045ebedfbecdac210168ec22c507cbdbf850a8b686493a31552efc6a28a8 with x0, x1, λ x3 . x2 leaving 4 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.
The subproof is completed by applying H2.
Let x3 of type ι be given.
Assume H4: x3x1.
The subproof is completed by applying H3.