proposition: Lemma centv1 V : 1 \in 'C(V)%VS.
proof: Proof. by apply/centvP=> v _; rewrite commr1. 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)