fact: Variables (A B : finType) (P1 : R.-fdist A) (P2 : R.-fdist B) (TA TB : eqType).
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