fact: Definition seq_contains_pointwise si s : Prop := forall k, contains (I.convert (seq.nth Int.zero si k)) (Xreal (PolR.nth s k)).
imports: Coq(ZArith Reals) Coquelicot(Coquelicot) mathcomp.ssreflect(ssreflect ssrfun ssrbool eqtype ssrnat seq fintype bigop) Flocq(Core) Stdlib MathComp Interval Xreal Basic_rec