fact: Definition make (f : {ffun A -> R}) (H0 : forall a, (0 <= f a)%R) (H1 : \sum_(a in A) f a = 1) : t.
imports: mathcomp(all_ssreflect ssralg fingroup perm matrix) mathcomp(all_algebra vector reals normedtype) mathcomp(mathcomp_extra boolp) mathcomp(Rstruct) ssrR logb realType_ext ssr_ext ssralg_ext bigop_ext