proposition: Lemma odiv_def a b : odiv a b = if a %% b == 0 then Some (a %/ b) else None.
proof: Proof. by rewrite /odiv /div; case: ediv. 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