proposition: Lemma mul_1alg : left_id one_alg mul_alg.
proof: Proof. by elim/quotW=> x; rewrite piE -equiv_alg /= mul_1creal. Qed.
imports: HB(structures) mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq choice fintype) mathcomp(bigop order ssralg ssrnum ssrint rat poly polydiv polyorder) mathcomp(perm matrix mxpoly polyXY binomial generic_quotient) mathcomp(cauchyreals separable zmodp bigenough)