proposition: Lemma fset_map_id_applied `{FSet A} x : fset_map id x = x.
proof: Proof. now apply fset_map_id. Qed.
imports: MathClasses.theory.lattices MathClasses.varieties.monoids MathClasses.implementations.bool MathClasses.implementations.list_finite_set MathClasses.orders.lattices MathClasses.interfaces.abstract_algebra MathClasses.interfaces.finite_sets MathClasses.interfaces.orders