fact: Definition chan_of_jtype (A B : finType) (Anot0 : (0 < #|A|)%nat) (Bnot0 : (0 < #|B|)%nat) n (f : {ffun A -> {ffun B -> 'I_n.+1}}) : `Ch*(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