proposition: Lemma setTE F : T`* F = setT `* F :> {set A * B}.
proof: Proof. by apply/setP => -[a b]; rewrite !inE. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum matrix) mathcomp(Rstruct reals) Reals Lra ssrR Reals_ext realType_ext logb ssr_ext ssralg_ext bigop_ext fdist