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Proofgold Proof

pf
Let x0 of type ι be given.
Let x1 of type ι be given.
Assume H0: SNo x0.
Assume H1: SNo x1.
Assume H2: SNoLe 0 x0.
Assume H3: SNoLe 0 x1.
Apply mul_SNo_zeroR with x0, λ x2 x3 . SNoLe x2 (mul_SNo x0 x1) leaving 2 subgoals.
The subproof is completed by applying H0.
Apply nonneg_mul_SNo_Le with x0, 0, x1 leaving 5 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H2.
The subproof is completed by applying SNo_0.
The subproof is completed by applying H1.
The subproof is completed by applying H3.
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