fact: Definition acc_gcd (n:nat) (hn: Acc (fun x y => x < y) n) : forall (a b:R), n = norm b -> R.
imports: HB(structures) Coq(ssreflect ssrfun ssrbool Arith.Wf_nat) mathcomp(eqtype ssrnat div seq path) mathcomp(ssralg fintype perm tuple choice generic_quotient) mathcomp(matrix bigop zmodp mxalgebra poly) stronglydiscrete