Proofgold Proof

pf
Let x0 of type ι be given. Let x1 of type ι be given. Assume H0: CSNo x0. Assume H1: CSNo x1. Apply CSNo_mul_CSNo with x0, recip_CSNo x1 leaving 2 subgoals. The subproof is completed by applying H0. Apply CSNo_recip_CSNo with x1. The subproof is completed by applying H1. ■