proposition: Lemma lfun_mulVr f : lker f == 0%VS -> f^-1%VF * f = 1.
proof: Proof. exact: lker0_compfV. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype div tuple finfun bigop ssralg) mathcomp(finalg zmodp matrix vector poly)