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. Apply SNo_mul_SNo with x0, recip_SNo x1 leaving 2 subgoals. The subproof is completed by applying H0. Apply SNo_recip_SNo with x1. The subproof is completed by applying H1. ■