proposition: Lemma expv0n n : (0 ^+ n = if n is _.+1 then 0 else 1)%VS.
proof: Proof. by case: n => // n; rewrite expvSl prod0v. 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)