fact: Definition jtype_choice_f (A B : finType) n (f : {ffun A -> {ffun B -> 'I_n.+1}}) : option (P_ n ( A , B )).
imports: mathcomp(all_ssreflect ssralg ssrnum fingroup perm) Reals mathcomp(Rstruct) ssrR Reals_ext realType_ext ssr_ext ssralg_ext logb fdist entropy num_occ channel types