fact: Definition contains_pointwise pi p : Prop := forall k, contains (I.convert (nth pi k)) (Xreal (PolR.nth p 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