(* Operations on [FSetC A] *) Require Import HoTT HitTactics. Require Import representations.cons_repr. Section operations. Context {A : Type}. Definition append (x y: FSetC A) : FSetC A. hinduction x. - apply y. - apply Cns. - apply dupl. - apply comm. Defined. Definition singleton (a:A) : FSetC A := a;;∅. End operations.