proposition: Lemma le_bound_anti : antisymmetric le_bound.
proof: Proof. by case=> [[]?|[]] [[]?|[]] //=; case: comparableP => // ->. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(div fintype bigop order ssralg finset fingroup) mathcomp(ssrnum)