fact: Definition hull (T : convType) (X : set T) : set T := [set p : T | exists n (g : 'I_n -> T) d, g @` setT `<=` X /\ p = <|>_d g].
imports: HB(structures) mathcomp(all_ssreflect ssralg fingroup perm matrix) mathcomp(mathcomp_extra boolp classical_sets Rstruct) mathcomp(ssrnum ereal) mathcomp(lra Rstruct reals) Reals ssrR Reals_ext Ranalysis_ext ssr_ext ssralg_ext logb realType_ext fdist