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diff --git a/matitaB/matita/contribs/LAMBDA-TYPES/Basic-1/subst/fwd.ma b/matitaB/matita/contribs/LAMBDA-TYPES/Basic-1/subst/fwd.ma
deleted file mode 100644
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--- a/matitaB/matita/contribs/LAMBDA-TYPES/Basic-1/subst/fwd.ma
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-(**************************************************************************)
-(*       ___                                                              *)
-(*      ||M||                                                             *)
-(*      ||A||       A project by Andrea Asperti                           *)
-(*      ||T||                                                             *)
-(*      ||I||       Developers:                                           *)
-(*      ||T||         The HELM team.                                      *)
-(*      ||A||         http://helm.cs.unibo.it                             *)
-(*      \   /                                                             *)
-(*       \ /        This file is distributed under the terms of the       *)
-(*        v         GNU General Public License Version 2                  *)
-(*                                                                        *)
-(**************************************************************************)
-
-(* This file was automatically generated: do not edit *********************)
-
-include "Basic-1/subst/defs.ma".
-
-theorem subst_sort:
- \forall (v: T).(\forall (d: nat).(\forall (k: nat).(eq T (subst d v (TSort 
-k)) (TSort k))))
-\def
- \lambda (_: T).(\lambda (_: nat).(\lambda (k: nat).(refl_equal T (TSort 
-k)))).
-(* COMMENTS
-Initial nodes: 13
-END *)
-
-theorem subst_lref_lt:
- \forall (v: T).(\forall (d: nat).(\forall (i: nat).((lt i d) \to (eq T 
-(subst d v (TLRef i)) (TLRef i)))))
-\def
- \lambda (v: T).(\lambda (d: nat).(\lambda (i: nat).(\lambda (H: (lt i 
-d)).(eq_ind_r bool true (\lambda (b: bool).(eq T (match b with [true 
-\Rightarrow (TLRef i) | false \Rightarrow (match (blt d i) with [true 
-\Rightarrow (TLRef (pred i)) | false \Rightarrow (lift d O v)])]) (TLRef i))) 
-(refl_equal T (TLRef i)) (blt i d) (lt_blt d i H))))).
-(* COMMENTS
-Initial nodes: 73
-END *)
-
-theorem subst_lref_eq:
- \forall (v: T).(\forall (i: nat).(eq T (subst i v (TLRef i)) (lift i O v)))
-\def
- \lambda (v: T).(\lambda (i: nat).(eq_ind_r bool false (\lambda (b: bool).(eq 
-T (match b with [true \Rightarrow (TLRef i) | false \Rightarrow (match b with 
-[true \Rightarrow (TLRef (pred i)) | false \Rightarrow (lift i O v)])]) (lift 
-i O v))) (refl_equal T (lift i O v)) (blt i i) (le_bge i i (le_n i)))).
-(* COMMENTS
-Initial nodes: 71
-END *)
-
-theorem subst_lref_gt:
- \forall (v: T).(\forall (d: nat).(\forall (i: nat).((lt d i) \to (eq T 
-(subst d v (TLRef i)) (TLRef (pred i))))))
-\def
- \lambda (v: T).(\lambda (d: nat).(\lambda (i: nat).(\lambda (H: (lt d 
-i)).(eq_ind_r bool false (\lambda (b: bool).(eq T (match b with [true 
-\Rightarrow (TLRef i) | false \Rightarrow (match (blt d i) with [true 
-\Rightarrow (TLRef (pred i)) | false \Rightarrow (lift d O v)])]) (TLRef 
-(pred i)))) (eq_ind_r bool true (\lambda (b: bool).(eq T (match b with [true 
-\Rightarrow (TLRef (pred i)) | false \Rightarrow (lift d O v)]) (TLRef (pred 
-i)))) (refl_equal T (TLRef (pred i))) (blt d i) (lt_blt i d H)) (blt i d) 
-(le_bge d i (lt_le_weak d i H)))))).
-(* COMMENTS
-Initial nodes: 130
-END *)
-
-theorem subst_head:
- \forall (k: K).(\forall (w: T).(\forall (u: T).(\forall (t: T).(\forall (d: 
-nat).(eq T (subst d w (THead k u t)) (THead k (subst d w u) (subst (s k d) w 
-t)))))))
-\def
- \lambda (k: K).(\lambda (w: T).(\lambda (u: T).(\lambda (t: T).(\lambda (d: 
-nat).(refl_equal T (THead k (subst d w u) (subst (s k d) w t))))))).
-(* COMMENTS
-Initial nodes: 37
-END *)
-