proposition: Lemma split_prodK n m : cancel (@split_prod n m) (@unsplit_prod n m).
proof: Proof. by move=> i; apply val_inj => /=; rewrite -divn_eq. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg fingroup perm matrix) mathcomp(mathcomp_extra boolp classical_sets Rstruct) mathcomp(ssrnum ereal) mathcomp(lra Rstruct reals) Reals ssrR Reals_ext Ranalysis_ext ssr_ext ssralg_ext logb realType_ext fdist