proposition: Lemma dvdUr a b : a %= 1 -> a %| b.
proof: Proof. by move=> a1; rewrite (eqd_dvd a1 (eqdd _)) dvd1r. Qed.
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