proposition: Lemma nth_toSeq p n : nth p n = seq.nth (C.zero) (toSeq p) n.
proof: Proof. by []. Qed.
imports: Coq(ZArith Reals) Coquelicot(Coquelicot) mathcomp.ssreflect(ssreflect ssrfun ssrbool eqtype ssrnat seq fintype bigop) Flocq(Core) Stdlib MathComp Interval Xreal Basic_rec