proposition: Lemma RhullT : Rhull setT = `]-oo, +oo[%R :> interval R.
proof: Proof. by rewrite /Rhull -set_itv_infty_infty asboolF// asboolF. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum ssrint interval) mathcomp(finmap fingroup perm rat) mathcomp(mathcomp_extra boolp classical_sets functions) HB(structures) reals ereal signed topology normedtype sequences