proposition: Lemma wlength_infty_bnd b r : wlength [set` Interval -oo%O (BSide b r)] = +oo :> \bar R.
proof: Proof. by rewrite wlength_itv /= ltNye. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum ssrint interval) mathcomp(finmap fingroup perm rat) HB(structures) mathcomp.classical(mathcomp_extra boolp classical_sets) mathcomp.classical(functions fsbigop cardinality) reals ereal signed topology numfun normedtype sequences esum real_interval measure realfun