proposition: Lemma neset_neq0 (a : neset A) : a != set0 :> set _.
proof: Proof. by case: a => [? []]. Qed.
imports: HB(structures) Reals mathcomp(all_ssreflect ssralg ssrnum) mathcomp(mathcomp_extra boolp classical_sets Rstruct reals) mathcomp(finmap) Reals_ext realType_ext classical_sets_ext ssrR fdist fsdist convex