proposition: Lemma freeg_nil : [freeg [::]] = 0 :> {freeg K / R}.
proof: Proof. exact/eqP/freeg_eqP. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop order generic_quotient) mathcomp(ssralg ssrnum ssrint)