Module Import MP := WProperties_fun E M.Definition Add := MP.Add.

(* Specifications: *)
Lemma mem_eq: E.eq x y -> mem x s=mem y s.
Lemma equal_mem_1: (forall a, mem a s=mem a s') -> equal s s'=true.
Lemma equal_mem_2: equal s s'=true -> forall a, mem a s=mem a s'.
Lemma subset_mem_1: (forall a, mem a s=true->mem a s'=true) -> subset s s'=true.
Lemma subset_mem_2: subset s s'=true -> forall a, mem a s=true -> mem a s'=true.
Lemma empty_mem: mem x empty=false.
Lemma is_empty_equal_empty: is_empty s = equal s empty.
Lemma choose_mem_1: choose s=Some x -> mem x s=true.
Lemma choose_mem_2: choose s=None -> is_empty s=true.
Lemma add_mem_1: mem x (add x s)=true.
Lemma add_mem_2: ~E.eq x y -> mem y (add x s)=mem y s.
Lemma remove_mem_1: mem x (remove x s)=false.
Lemma remove_mem_2: ~E.eq x y -> mem y (remove x s)=mem y s.
Lemma singleton_equal_add: equal (singleton x) (add x empty)=true.
Lemma union_mem: mem x (union s s')=mem x s || mem x s'.
Lemma inter_mem: mem x (inter s s')=mem x s && mem x s'.
Lemma diff_mem: mem x (diff s s')=mem x s && negb (mem x s').
Lemma mem_3 : ~In x s -> mem x s=false.
Lemma mem_4 : mem x s=false -> ~In x s.
Lemma equal_refl: equal s s=true.
Lemma equal_sym: equal s s'=equal s' s.
Lemma equal_trans: equal s s'=true -> equal s' s''=true -> equal s s''=true.
Lemma equal_equal: equal s s'=true -> equal s s''=equal s' s''.
Lemma equal_cardinal: equal s s'=true -> cardinal s=cardinal s'.
Lemma subset_refl: subset s s=true.
Lemma subset_antisym: subset s s'=true -> subset s' s=true -> equal s s'=true.
Lemma subset_trans: subset s s'=true -> subset s' s''=true -> subset s s''=true.
Lemma subset_equal: equal s s'=true -> subset s s'=true.
Lemma choose_mem_3: is_empty s=false -> {x:elt|choose s=Some x /\ mem x s=true}.
Lemma choose_mem_4: choose empty=None.
Lemma add_mem_3: mem y s=true -> mem y (add x s)=true.
Lemma add_equal: mem x s=true -> equal (add x s) s=true.
Lemma remove_mem_3: mem y (remove x s)=true -> mem y s=true.
Lemma remove_equal: mem x s=false -> equal (remove x s) s=true.
Lemma add_remove: mem x s=true -> equal (add x (remove x s)) s=true.
Lemma remove_add: mem x s=false -> equal (remove x (add x s)) s=true.
Lemma is_empty_cardinal: is_empty s = zerob (cardinal s).
Lemma singleton_mem_1: mem x (singleton x)=true.
Lemma singleton_mem_2: ~E.eq x y -> mem y (singleton x)=false.
Lemma singleton_mem_3: mem y (singleton x)=true -> E.eq x y.
Lemma union_sym: equal (union s s') (union s' s)=true.
Lemma union_subset_equal: subset s s'=true -> equal (union s s') s'=true.
Lemma union_equal_1: equal s s'=true-> equal (union s s'') (union s' s'')=true.
Lemma union_equal_2: equal s' s''=true-> equal (union s s') (union s s'')=true.
Lemma union_assoc: equal (union (union s s') s'') (union s (union s' s''))=true.
Lemma add_union_singleton: equal (add x s) (union (singleton x) s)=true.
Lemma union_add: equal (union (add x s) s') (add x (union s s'))=true.
Lemma union_subset_1: subset s (union s s')=true.
Lemma union_subset_2: subset s' (union s s')=true.
Lemma union_subset_3: subset s s''=true -> subset s' s''=true -> subset (union s s') s''=true.
Lemma inter_sym: equal (inter s s') (inter s' s)=true.
Lemma inter_subset_equal: subset s s'=true -> equal (inter s s') s=true.
Lemma inter_equal_1: equal s s'=true -> equal (inter s s'') (inter s' s'')=true.
Lemma inter_equal_2: equal s' s''=true -> equal (inter s s') (inter s s'')=true.
Lemma inter_assoc: equal (inter (inter s s') s'') (inter s (inter s' s''))=true.
Lemma union_inter_1: equal (inter (union s s') s'') (union (inter s s'') (inter s' s''))=true.
Lemma union_inter_2: equal (union (inter s s') s'') (inter (union s s'') (union s' s''))=true.
Lemma inter_add_1: mem x s'=true -> equal (inter (add x s) s') (add x (inter s s'))=true.
Lemma inter_add_2: mem x s'=false -> equal (inter (add x s) s') (inter s s')=true.
Lemma inter_subset_1: subset (inter s s') s=true.
Lemma inter_subset_2: subset (inter s s') s'=true.
Lemma inter_subset_3: subset s'' s=true -> subset s'' s'=true -> subset s'' (inter s s')=true.
Lemma diff_subset: subset (diff s s') s=true.
Lemma diff_subset_equal: subset s s'=true -> equal (diff s s') empty=true.
Lemma remove_inter_singleton: equal (remove x s) (diff s (singleton x))=true.
Lemma diff_inter_empty: equal (inter (diff s s') (inter s s')) empty=true.
Lemma diff_inter_all: equal (union (diff s s') (inter s s')) s=true.
Lemma set_rec: forall (P:t->Type), (forall s s', equal s s'=true -> P s -> P s') -> (forall s x, mem x s=false -> P s -> P (add x s)) -> P empty -> forall s, P s.
Lemma exclusive_set : forall s s' x, ~(In x s/\In x s') <-> mem x s && mem x s'=false.
Lemma fold_empty: (fold f empty i) = i.
Lemma fold_equal: equal s s'=true -> eqA (fold f s i) (fold f s' i).
Lemma fold_add: mem x s=false -> eqA (fold f (add x s) i) (f x (fold f s i)).
Lemma add_fold: mem x s=true -> eqA (fold f (add x s) i) (fold f s i).
Lemma remove_fold_1: mem x s=true -> eqA (f x (fold f (remove x s) i)) (fold f s i).
Lemma remove_fold_2: mem x s=false -> eqA (fold f (remove x s) i) (fold f s i).
Lemma fold_union: (forall x, mem x s && mem x s'=false) -> eqA (fold f (union s s') i) (fold f s (fold f s' i)).
Lemma add_cardinal_1: forall s x, mem x s=true -> cardinal (add x s)=cardinal s.
Lemma add_cardinal_2: forall s x, mem x s=false -> cardinal (add x s)=S (cardinal s).
Lemma remove_cardinal_1: forall s x, mem x s=true -> S (cardinal (remove x s))=cardinal s.
Lemma remove_cardinal_2: forall s x, mem x s=false -> cardinal (remove x s)=cardinal s.
Lemma union_cardinal: forall s s', (forall x, mem x s && mem x s'=false) -> cardinal (union s s')=cardinal s+cardinal s'.
Lemma subset_cardinal: forall s s', subset s s'=true -> cardinal s<=cardinal s'.