proposition: Fact algC_invaut_is_rmorphism nu : multiplicative (algC_invaut nu).
proof: Proof. exact: can2_rmorphism (algC_autK nu) (algC_invautK nu). Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun ssrnat eqtype seq choice) mathcomp(div fintype path bigop finset prime order ssralg) mathcomp(poly polydiv mxpoly generic_quotient countalg) mathcomp(ssrnum closed_field ssrint archimedean rat intdiv) mathcomp(algebraics_fundamentals)