fact: Definition dist_of_RV (X : {RV P -> A}) : {fdist A} := fdistmap X P.
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