fact: Parameter sub_correct : forall u pi qi p q, pi >:: p -> qi >:: q -> sub u pi qi >:: PolR.sub tt p q.
imports: Coq(ZArith Reals) Coquelicot(Coquelicot) mathcomp.ssreflect(ssreflect ssrfun ssrbool eqtype ssrnat seq fintype bigop) Flocq(Core) Stdlib MathComp Interval Xreal Basic_rec