include "legacy_1/coq/fwd.ma".
-theorem f_equal:
+lemma f_equal:
\forall (A: Type[0]).(\forall (B: Type[0]).(\forall (f: ((A \to
B))).(\forall (x: A).(\forall (y: A).((eq A x y) \to (eq B (f x) (f y)))))))
\def
B))).(\lambda (x: A).(\lambda (y: A).(\lambda (H: (eq A x y)).(eq_ind A x
(\lambda (a: A).(eq B (f x) (f a))) (refl_equal B (f x)) y H)))))).
-theorem f_equal2:
+lemma f_equal2:
\forall (A1: Type[0]).(\forall (A2: Type[0]).(\forall (B: Type[0]).(\forall
(f: ((A1 \to (A2 \to B)))).(\forall (x1: A1).(\forall (y1: A1).(\forall (x2:
A2).(\forall (y2: A2).((eq A1 x1 y1) \to ((eq A2 x2 y2) \to (eq B (f x1 x2)
y2)).(eq_ind A2 x2 (\lambda (a: A2).(eq B (f x1 x2) (f x1 a))) (refl_equal B
(f x1 x2)) y2 H0)) y1 H))))))))).
-theorem f_equal3:
+lemma f_equal3:
\forall (A1: Type[0]).(\forall (A2: Type[0]).(\forall (A3: Type[0]).(\forall
(B: Type[0]).(\forall (f: ((A1 \to (A2 \to (A3 \to B))))).(\forall (x1:
A1).(\forall (y1: A1).(\forall (x2: A2).(\forall (y2: A2).(\forall (x3:
x3 (\lambda (a: A3).(eq B (f x1 x2 x3) (f x1 x2 a))) (refl_equal B (f x1 x2
x3)) y3 H1)) y2 H0)) y1 H)))))))))))).
-theorem sym_eq:
+lemma sym_eq:
\forall (A: Type[0]).(\forall (x: A).(\forall (y: A).((eq A x y) \to (eq A y
x))))
\def
\lambda (A: Type[0]).(\lambda (x: A).(\lambda (y: A).(\lambda (H: (eq A x
y)).(eq_ind A x (\lambda (a: A).(eq A a x)) (refl_equal A x) y H)))).
-theorem eq_ind_r:
+lemma eq_ind_r:
\forall (A: Type[0]).(\forall (x: A).(\forall (P: ((A \to Prop))).((P x) \to
(\forall (y: A).((eq A y x) \to (P y))))))
\def
(H: (P x)).(\lambda (y: A).(\lambda (H0: (eq A y x)).(match (sym_eq A y x H0)
with [refl_equal \Rightarrow H])))))).
-theorem trans_eq:
+lemma trans_eq:
\forall (A: Type[0]).(\forall (x: A).(\forall (y: A).(\forall (z: A).((eq A
x y) \to ((eq A y z) \to (eq A x z))))))
\def
A).(\lambda (H: (eq A x y)).(\lambda (H0: (eq A y z)).(eq_ind A y (\lambda
(a: A).(eq A x a)) H z H0)))))).
-theorem sym_not_eq:
+lemma sym_not_eq:
\forall (A: Type[0]).(\forall (x: A).(\forall (y: A).((not (eq A x y)) \to
(not (eq A y x)))))
\def
A x y))).(\lambda (h2: (eq A y x)).(h1 (eq_ind A y (\lambda (a: A).(eq A a
y)) (refl_equal A y) x h2)))))).
-theorem nat_double_ind:
+lemma nat_double_ind:
\forall (R: ((nat \to (nat \to Prop)))).(((\forall (n: nat).(R O n))) \to
(((\forall (n: nat).(R (S n) O))) \to (((\forall (n: nat).(\forall (m:
nat).((R n m) \to (R (S n) (S m)))))) \to (\forall (n: nat).(\forall (m:
(\lambda (n1: nat).(R (S n0) n1)) (H0 n0) (\lambda (n1: nat).(\lambda (_: (R
(S n0) n1)).(H1 n0 n1 (H2 n1)))) m)))) n))))).
-theorem eq_add_S:
+lemma eq_add_S:
\forall (n: nat).(\forall (m: nat).((eq nat (S n) (S m)) \to (eq nat n m)))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (eq nat (S n) (S
m))).(f_equal nat nat pred (S n) (S m) H))).
-theorem O_S:
+lemma O_S:
\forall (n: nat).(not (eq nat O (S n)))
\def
\lambda (n: nat).(\lambda (H: (eq nat O (S n))).(eq_ind nat (S n) (\lambda
(n0: nat).(IsSucc n0)) I O (sym_eq nat O (S n) H))).
-theorem not_eq_S:
+lemma not_eq_S:
\forall (n: nat).(\forall (m: nat).((not (eq nat n m)) \to (not (eq nat (S
n) (S m)))))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (not (eq nat n m))).(\lambda
(H0: (eq nat (S n) (S m))).(H (eq_add_S n m H0))))).
-theorem pred_Sn:
+lemma pred_Sn:
\forall (m: nat).(eq nat m (pred (S m)))
\def
\lambda (m: nat).(refl_equal nat (pred (S m))).
-theorem S_pred:
+lemma S_pred:
\forall (n: nat).(\forall (m: nat).((lt m n) \to (eq nat n (S (pred n)))))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (lt m n)).(le_ind (S m)
m)))) (\lambda (m0: nat).(\lambda (_: (le (S m) m0)).(\lambda (_: (eq nat m0
(S (pred m0)))).(refl_equal nat (S (pred (S m0))))))) n H))).
-theorem le_trans:
+lemma le_trans:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((le n m) \to ((le m p)
\to (le n p)))))
\def
(\lambda (m0: nat).(\lambda (_: (le m m0)).(\lambda (IHle: (le n m0)).(le_S n
m0 IHle)))) p H0))))).
-theorem le_trans_S:
+lemma le_trans_S:
\forall (n: nat).(\forall (m: nat).((le (S n) m) \to (le n m)))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (le (S n) m)).(le_trans n (S
n) m (le_S n n (le_n n)) H))).
-theorem le_n_S:
+lemma le_n_S:
\forall (n: nat).(\forall (m: nat).((le n m) \to (le (S n) (S m))))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (le n m)).(le_ind n (\lambda
(n0: nat).(le (S n) (S n0))) (le_n (S n)) (\lambda (m0: nat).(\lambda (_: (le
n m0)).(\lambda (IHle: (le (S n) (S m0))).(le_S (S n) (S m0) IHle)))) m H))).
-theorem le_O_n:
+lemma le_O_n:
\forall (n: nat).(le O n)
\def
\lambda (n: nat).(nat_ind (\lambda (n0: nat).(le O n0)) (le_n O) (\lambda
(n0: nat).(\lambda (IHn: (le O n0)).(le_S O n0 IHn))) n).
-theorem le_S_n:
+lemma le_S_n:
\forall (n: nat).(\forall (m: nat).((le (S n) (S m)) \to (le n m)))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (le (S n) (S m))).(le_ind (S
nat).(\lambda (H0: (le (S n) m0)).(\lambda (_: (le n (pred m0))).(le_trans_S
n m0 H0)))) (S m) H))).
-theorem le_Sn_O:
+lemma le_Sn_O:
\forall (n: nat).(not (le (S n) O))
\def
\lambda (n: nat).(\lambda (H: (le (S n) O)).(le_ind (S n) (\lambda (n0:
nat).(IsSucc n0)) I (\lambda (m: nat).(\lambda (_: (le (S n) m)).(\lambda (_:
(IsSucc m)).I))) O H)).
-theorem le_Sn_n:
+lemma le_Sn_n:
\forall (n: nat).(not (le (S n) n))
\def
\lambda (n: nat).(nat_ind (\lambda (n0: nat).(not (le (S n0) n0))) (le_Sn_O
O) (\lambda (n0: nat).(\lambda (IHn: (not (le (S n0) n0))).(\lambda (H: (le
(S (S n0)) (S n0))).(IHn (le_S_n (S n0) n0 H))))) n).
-theorem le_antisym:
+lemma le_antisym:
\forall (n: nat).(\forall (m: nat).((le n m) \to ((le m n) \to (eq nat n
m))))
\def
m0)) (let H2 \def (le_trans (S m0) n m0 H1 H) in ((let H3 \def (le_Sn_n m0)
in (\lambda (H4: (le (S m0) m0)).(H3 H4))) H2))))))) m h))).
-theorem le_n_O_eq:
+lemma le_n_O_eq:
\forall (n: nat).((le n O) \to (eq nat O n))
\def
\lambda (n: nat).(\lambda (H: (le n O)).(le_antisym O n (le_O_n n) H)).
-theorem le_elim_rel:
+lemma le_elim_rel:
\forall (P: ((nat \to (nat \to Prop)))).(((\forall (p: nat).(P O p))) \to
(((\forall (p: nat).(\forall (q: nat).((le p q) \to ((P p q) \to (P (S p) (S
q))))))) \to (\forall (n: nat).(\forall (m: nat).((le n m) \to (P n m))))))
(P (S n0) m0)).(H0 n0 m0 (le_trans_S n0 m0 H1) (IHn m0 (le_trans_S n0 m0
H1)))))) m Le))))) n)))).
-theorem lt_n_n:
+lemma lt_n_n:
\forall (n: nat).(not (lt n n))
\def
le_Sn_n.
-theorem lt_n_S:
+lemma lt_n_S:
\forall (n: nat).(\forall (m: nat).((lt n m) \to (lt (S n) (S m))))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (lt n m)).(le_n_S (S n) m
H))).
-theorem lt_n_Sn:
+lemma lt_n_Sn:
\forall (n: nat).(lt n (S n))
\def
\lambda (n: nat).(le_n (S n)).
-theorem lt_S_n:
+lemma lt_S_n:
\forall (n: nat).(\forall (m: nat).((lt (S n) (S m)) \to (lt n m)))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (lt (S n) (S m))).(le_S_n (S
n) m H))).
-theorem lt_n_O:
+lemma lt_n_O:
\forall (n: nat).(not (lt n O))
\def
le_Sn_O.
-theorem lt_trans:
+lemma lt_trans:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((lt n m) \to ((lt m p)
\to (lt n p)))))
\def
(S n) m H) (\lambda (m0: nat).(\lambda (_: (le (S m) m0)).(\lambda (IHle: (lt
n m0)).(le_S (S n) m0 IHle)))) p H0))))).
-theorem lt_O_Sn:
+lemma lt_O_Sn:
\forall (n: nat).(lt O (S n))
\def
\lambda (n: nat).(le_n_S O n (le_O_n n)).
-theorem lt_le_S:
+lemma lt_le_S:
\forall (n: nat).(\forall (p: nat).((lt n p) \to (le (S n) p)))
\def
\lambda (n: nat).(\lambda (p: nat).(\lambda (H: (lt n p)).H)).
-theorem le_not_lt:
+lemma le_not_lt:
\forall (n: nat).(\forall (m: nat).((le n m) \to (not (lt m n))))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (le n m)).(le_ind n (\lambda
m0)).(\lambda (IHle: (not (lt m0 n))).(\lambda (H1: (lt (S m0) n)).(IHle
(le_trans_S (S m0) n H1)))))) m H))).
-theorem le_lt_n_Sm:
+lemma le_lt_n_Sm:
\forall (n: nat).(\forall (m: nat).((le n m) \to (lt n (S m))))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (le n m)).(le_n_S n m H))).
-theorem le_lt_trans:
+lemma le_lt_trans:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((le n m) \to ((lt m p)
\to (lt n p)))))
\def
(le_n_S n m H) (\lambda (m0: nat).(\lambda (_: (le (S m) m0)).(\lambda (IHle:
(lt n m0)).(le_S (S n) m0 IHle)))) p H0))))).
-theorem lt_le_trans:
+lemma lt_le_trans:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((lt n m) \to ((le m p)
\to (lt n p)))))
\def
(\lambda (m0: nat).(\lambda (_: (le m m0)).(\lambda (IHle: (lt n m0)).(le_S
(S n) m0 IHle)))) p H0))))).
-theorem lt_le_weak:
+lemma lt_le_weak:
\forall (n: nat).(\forall (m: nat).((lt n m) \to (le n m)))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (lt n m)).(le_trans_S n m
H))).
-theorem lt_n_Sm_le:
+lemma lt_n_Sm_le:
\forall (n: nat).(\forall (m: nat).((lt n (S m)) \to (le n m)))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (lt n (S m))).(le_S_n n m
H))).
-theorem le_lt_or_eq:
+lemma le_lt_or_eq:
\forall (n: nat).(\forall (m: nat).((le n m) \to (or (lt n m) (eq nat n m))))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (le n m)).(le_ind n (\lambda
(or (lt n m0) (eq nat n m0))).(or_introl (lt n (S m0)) (eq nat n (S m0))
(le_n_S n m0 H0))))) m H))).
-theorem le_or_lt:
+lemma le_or_lt:
\forall (n: nat).(\forall (m: nat).(or (le n m) (lt m n)))
\def
\lambda (n: nat).(\lambda (m: nat).(nat_double_ind (\lambda (n0:
n0)) (le_n_S n0 m0 H0))) (\lambda (H0: (lt m0 n0)).(or_intror (le (S n0) (S
m0)) (lt (S m0) (S n0)) (le_n_S (S m0) n0 H0))) H)))) n m)).
-theorem plus_n_O:
+lemma plus_n_O:
\forall (n: nat).(eq nat n (plus n O))
\def
\lambda (n: nat).(nat_ind (\lambda (n0: nat).(eq nat n0 (plus n0 O)))
(refl_equal nat O) (\lambda (n0: nat).(\lambda (H: (eq nat n0 (plus n0
O))).(f_equal nat nat S n0 (plus n0 O) H))) n).
-theorem plus_n_Sm:
+lemma plus_n_Sm:
\forall (n: nat).(\forall (m: nat).(eq nat (S (plus n m)) (plus n (S m))))
\def
\lambda (m: nat).(\lambda (n: nat).(nat_ind (\lambda (n0: nat).(eq nat (S
nat).(\lambda (H: (eq nat (S (plus n0 n)) (plus n0 (S n)))).(f_equal nat nat
S (S (plus n0 n)) (plus n0 (S n)) H))) m)).
-theorem plus_sym:
+lemma plus_sym:
\forall (n: nat).(\forall (m: nat).(eq nat (plus n m) (plus m n)))
\def
\lambda (n: nat).(\lambda (m: nat).(nat_ind (\lambda (n0: nat).(eq nat (plus
(plus y m)) n0)) (f_equal nat nat S (plus y m) (plus m y) H) (plus m (S y))
(plus_n_Sm m y)))) n)).
-theorem plus_Snm_nSm:
+lemma plus_Snm_nSm:
\forall (n: nat).(\forall (m: nat).(eq nat (plus (S n) m) (plus n (S m))))
\def
\lambda (n: nat).(\lambda (m: nat).(eq_ind_r nat (plus m n) (\lambda (n0:
(n0: nat).(eq nat (S (plus m n)) n0)) (refl_equal nat (plus (S m) n)) (plus n
(S m)) (plus_sym n (S m))) (plus n m) (plus_sym n m))).
-theorem plus_assoc_l:
+lemma plus_assoc_l:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).(eq nat (plus n (plus m
p)) (plus (plus n m) p))))
\def
(plus (plus n0 m) p))).(f_equal nat nat S (plus n0 (plus m p)) (plus (plus n0
m) p) H))) n))).
-theorem plus_assoc_r:
+lemma plus_assoc_r:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).(eq nat (plus (plus n
m) p) (plus n (plus m p)))))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (p: nat).(sym_eq nat (plus n
(plus m p)) (plus (plus n m) p) (plus_assoc_l n m p)))).
-theorem simpl_plus_l:
+lemma simpl_plus_l:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((eq nat (plus n m)
(plus n p)) \to (eq nat m p))))
\def
(plus n0 m) (plus n0 p) (f_equal nat nat (plus n0) (plus n0 m) (plus n0 p)
(eq_add_S (plus n0 m) (plus n0 p) H))))))))) n).
-theorem minus_n_O:
+lemma minus_n_O:
\forall (n: nat).(eq nat n (minus n O))
\def
\lambda (n: nat).(nat_ind (\lambda (n0: nat).(eq nat n0 (minus n0 O)))
(refl_equal nat O) (\lambda (n0: nat).(\lambda (_: (eq nat n0 (minus n0
O))).(refl_equal nat (S n0)))) n).
-theorem minus_n_n:
+lemma minus_n_n:
\forall (n: nat).(eq nat O (minus n n))
\def
\lambda (n: nat).(nat_ind (\lambda (n0: nat).(eq nat O (minus n0 n0)))
(refl_equal nat O) (\lambda (n0: nat).(\lambda (IHn: (eq nat O (minus n0
n0))).IHn)) n).
-theorem minus_Sn_m:
+lemma minus_Sn_m:
\forall (n: nat).(\forall (m: nat).((le m n) \to (eq nat (S (minus n m))
(minus (S n) m))))
\def
(le p q)).(\lambda (H0: (eq nat (S (minus q p)) (match p with [O \Rightarrow
(S q) | (S l) \Rightarrow (minus q l)]))).H0)))) m n Le))).
-theorem plus_minus:
+lemma plus_minus:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((eq nat n (plus m p))
\to (eq nat p (minus n m)))))
\def
nat p (minus m0 n0))))).(\lambda (H0: (eq nat (S m0) (S (plus n0 p)))).(H
(eq_add_S m0 (plus n0 p) H0)))))) m n))).
-theorem minus_plus:
+lemma minus_plus:
\forall (n: nat).(\forall (m: nat).(eq nat (minus (plus n m) n) m))
\def
\lambda (n: nat).(\lambda (m: nat).(sym_eq nat m (minus (plus n m) n)
(plus_minus (plus n m) n m (refl_equal nat (plus n m))))).
-theorem le_pred_n:
+lemma le_pred_n:
\forall (n: nat).(le (pred n) n)
\def
\lambda (n: nat).(nat_ind (\lambda (n0: nat).(le (pred n0) n0)) (le_n O)
(\lambda (n0: nat).(\lambda (_: (le (pred n0) n0)).(le_S (pred (S n0)) n0
(le_n n0)))) n).
-theorem le_plus_l:
+lemma le_plus_l:
\forall (n: nat).(\forall (m: nat).(le n (plus n m)))
\def
\lambda (n: nat).(nat_ind (\lambda (n0: nat).(\forall (m: nat).(le n0 (plus
((\forall (m: nat).(le n0 (plus n0 m))))).(\lambda (m: nat).(le_n_S n0 (plus
n0 m) (IHn m))))) n).
-theorem le_plus_r:
+lemma le_plus_r:
\forall (n: nat).(\forall (m: nat).(le m (plus n m)))
\def
\lambda (n: nat).(\lambda (m: nat).(nat_ind (\lambda (n0: nat).(le m (plus
n0 m))) (le_n m) (\lambda (n0: nat).(\lambda (H: (le m (plus n0 m))).(le_S m
(plus n0 m) H))) n)).
-theorem simpl_le_plus_l:
+lemma simpl_le_plus_l:
\forall (p: nat).(\forall (n: nat).(\forall (m: nat).((le (plus p n) (plus p
m)) \to (le n m))))
\def
(H: (le (S (plus p0 n)) (S (plus p0 m)))).(IHp n m (le_S_n (plus p0 n) (plus
p0 m) H))))))) p).
-theorem le_plus_trans:
+lemma le_plus_trans:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((le n m) \to (le n
(plus m p)))))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (p: nat).(\lambda (H: (le n
m)).(le_trans n m (plus m p) H (le_plus_l m p))))).
-theorem le_reg_l:
+lemma le_reg_l:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((le n m) \to (le (plus
p n) (plus p m)))))
\def
m))))).(\lambda (H: (le n m)).(le_n_S (plus p0 n) (plus p0 m) (IHp H)))))
p))).
-theorem le_plus_plus:
+lemma le_plus_plus:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).(\forall (q: nat).((le
n m) \to ((le p q) \to (le (plus n p) (plus m q)))))))
\def
nat).(\lambda (_: (le n m0)).(\lambda (H2: (le (plus n p) (plus m0 q))).(le_S
(plus n p) (plus m0 q) H2)))) m H)))))).
-theorem le_plus_minus:
+lemma le_plus_minus:
\forall (n: nat).(\forall (m: nat).((le n m) \to (eq nat m (plus n (minus m
n)))))
\def
(_: (le p q)).(\lambda (H0: (eq nat q (plus p (minus q p)))).(f_equal nat nat
S q (plus p (minus q p)) H0))))) n m Le))).
-theorem le_plus_minus_r:
+lemma le_plus_minus_r:
\forall (n: nat).(\forall (m: nat).((le n m) \to (eq nat (plus n (minus m
n)) m)))
\def
\lambda (n: nat).(\lambda (m: nat).(\lambda (H: (le n m)).(sym_eq nat m
(plus n (minus m n)) (le_plus_minus n m H)))).
-theorem simpl_lt_plus_l:
+lemma simpl_lt_plus_l:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((lt (plus p n) (plus p
m)) \to (lt n m))))
\def
m)))).(\lambda (H: (lt (S (plus p0 n)) (S (plus p0 m)))).(IHp (le_S_n (S
(plus p0 n)) (plus p0 m) H))))) p))).
-theorem lt_reg_l:
+lemma lt_reg_l:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((lt n m) \to (lt (plus
p n) (plus p m)))))
\def
m))))).(\lambda (H: (lt n m)).(lt_n_S (plus p0 n) (plus p0 m) (IHp H)))))
p))).
-theorem lt_reg_r:
+lemma lt_reg_r:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).((lt n m) \to (lt (plus
n p) (plus m p)))))
\def
(plus n0 n) (plus n0 m))).(lt_reg_l n m (S n0) H))) p) (plus m p) (plus_sym m
p)) (plus n p) (plus_sym n p))))).
-theorem le_lt_plus_plus:
+lemma le_lt_plus_plus:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).(\forall (q: nat).((le
n m) \to ((lt p q) \to (lt (plus n p) (plus m q)))))))
\def
(S p)) (\lambda (n0: nat).(le n0 (plus m q))) (le_plus_plus n m (S p) q H H0)
(plus (S n) p) (plus_Snm_nSm n p))))))).
-theorem lt_le_plus_plus:
+lemma lt_le_plus_plus:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).(\forall (q: nat).((lt
n m) \to ((le p q) \to (lt (plus n p) (plus m q)))))))
\def
nat).(\lambda (H: (le (S n) m)).(\lambda (H0: (le p q)).(le_plus_plus (S n) m
p q H H0)))))).
-theorem lt_plus_plus:
+lemma lt_plus_plus:
\forall (n: nat).(\forall (m: nat).(\forall (p: nat).(\forall (q: nat).((lt
n m) \to ((lt p q) \to (lt (plus n p) (plus m q)))))))
\def
nat).(\lambda (H: (lt n m)).(\lambda (H0: (lt p q)).(lt_le_plus_plus n m p q
H (lt_le_weak p q H0))))))).
-theorem well_founded_ltof:
+lemma well_founded_ltof:
\forall (A: Type[0]).(\forall (f: ((A \to nat))).(well_founded A (ltof A f)))
\def
\lambda (A: Type[0]).(\lambda (f: ((A \to nat))).(let H \def (\lambda (n:
(lt_n_Sm_le (f a) n0 ltSma)))))))))) n)) in (\lambda (a: A).(H (S (f a)) a
(le_n (S (f a))))))).
-theorem lt_wf:
+lemma lt_wf:
well_founded nat lt
\def
well_founded_ltof nat (\lambda (m: nat).m).
-theorem lt_wf_ind:
+lemma lt_wf_ind:
\forall (p: nat).(\forall (P: ((nat \to Prop))).(((\forall (n:
nat).(((\forall (m: nat).((lt m n) \to (P m)))) \to (P n)))) \to (P p)))
\def