proposition: Lemma leBNlt n (p q: BITS n) : leB p q = ~~ ltB q p.
proof: Proof. rewrite ltB_nat leB_nat. by rewrite leqNgt. Qed.
imports: HB(structures) mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq fintype tuple zmodp div) ssrextra.tuple ssrextra.nat spec spec.properties operations mathcomp(ssralg)