proposition: Lemma sq_RV_pow2 X x : sq_RV X x = (X x) ^ 2.
proof: Proof. reflexivity. 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