fact: Definition bmnm_enum : seq 'X_{1..n < b} := let project (x : n.-tuple 'I_b) := [multinom of map val x] in pmap insub [seq (project x) | x <- enum {: n.-tuple 'I_b }].
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype tuple finfun bigop finset binomial) mathcomp(order fingroup perm ssralg zmodp poly ssrint) mathcomp(matrix vector) mathcomp(bigenough) ssrcomplements freeg