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Proofgold Proof

pf
Let x0 of type ι be given.
Assume H0: RealsStruct x0.
Let x1 of type ι be given.
Assume H1: x1 ∈ field0 x0.
Assume H2: field2b x0 x1 x1 = field4 x0.
Apply RealsStruct_mult_zero_inv with x0, x1, x1, x1 = field4 x0 leaving 6 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.
The subproof is completed by applying H1.
The subproof is completed by applying H2.
Assume H3: x1 = field4 x0.
The subproof is completed by applying H3.
Assume H3: x1 = field4 x0.
The subproof is completed by applying H3.
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