proposition: Lemma malgC_eq (c1 c2 : G) : (c1%:MP == c2%:MP :> {malg G[K]}) = (c1 == c2).
proof: Proof. by apply/eqP/eqP=> [|->//] /malgP/(_ 1%M); rewrite !mcoeffU eqxx. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path choice finset fintype finfun) mathcomp(tuple bigop ssralg ssrint ssrnum) xfinmap