proposition: Lemma expvSr U n : (U ^+ n.+1 = U ^+ n * U)%VS.
proof: Proof. by rewrite -addn1 expvD. 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)