proposition: Fact anti : antisymmetric le.
proof: Proof. case=> [? ?] [? ?]. by rewrite andbAC andbA andbAC -andbA => /= /andP [] /le_anti -> /le_anti ->. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(path fintype tuple bigop finset div prime finfun) mathcomp(finset)