fact: Structure finpred (T : eqType) (pT : predType T) := FinPred { pred_of_finpred :> pT; _ : is_finite [pred x in pred_of_finpred] }.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrnat eqtype ssrfun seq) mathcomp(choice path finset finfun fintype bigop)