fact: Parameter nth_default_alt : forall pi p, pi >:: p -> forall n : nat, size pi <= n -> PolR.nth p n = 0%R.
imports: Coq(ZArith Reals) Coquelicot(Coquelicot) mathcomp.ssreflect(ssreflect ssrfun ssrbool eqtype ssrnat seq fintype bigop) Flocq(Core) Stdlib MathComp Interval Xreal Basic_rec