proposition: Fact conj_is_additive : {morph (fun u => LtoC (conj_subproof u)) : x / - x}.
proof: Proof. by move=> u; apply: CtoL_inj; rewrite LtoC_K !raddfN /= LtoC_K. 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)