proposition: Lemma size_seq_of_rV v : size (seq_of_rV v) = d.
proof: Proof. by rewrite tuple.size_tuple card_ord. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(div fintype tuple finfun bigop fingroup perm) mathcomp(ssralg zmodp matrix mxalgebra poly polydiv)