proposition: Lemma arg_maxP: extremum_spec >=%O P F (arg_max i0 P F).
proof: Proof. by apply: extremumP => //; [apply: ge_refl | apply: ge_trans]. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(path fintype tuple bigop finset div prime finfun) mathcomp(finset)