proposition: Lemma vitali_collection_partition_ub_gt0 i : V i -> 0 < r.
proof: Proof. by move=> Vi; rewrite (lt_le_trans _ (VBr Vi)). Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrint ssrnum finmap matrix) mathcomp(rat interval zmodp vector fieldext falgebra) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality set_interval Rstruct) ereal reals signed topology prodnormedzmodule