proposition: Lemma Sba_mjK x: (Sba_j x) ^-1 = (Sba_m x^-1).
proof: Proof. by rewrite /Sba_m /Sba_j invrK /Sba_i. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq choice fintype order bigop ssralg) mathcomp(div ssrnum ssrint rat prime path binomial) mathcomp(tuple finset) gaia(fibm)