proposition: Lemma p_of_r0 r : [p_of r, 0%:pr] = 0%:pr.
proof: Proof. by apply/val_inj; rewrite /= p_of_rsE mulr0. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum) mathcomp(reals normedtype) mathcomp(mathcomp_extra boolp) mathcomp(lra ring Rstruct)