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diff --git a/matita/matita/contribs/lambda_delta/Basic_2/grammar/cl_weight.ma b/matita/matita/contribs/lambda_delta/Basic_2/grammar/cl_weight.ma
index 35bf32a9d..355b8a797 100644
--- a/matita/matita/contribs/lambda_delta/Basic_2/grammar/cl_weight.ma
+++ b/matita/matita/contribs/lambda_delta/Basic_2/grammar/cl_weight.ma
@@ -12,8 +12,8 @@
 (*                                                                        *)
 (**************************************************************************)
 
-include "Basic-2/grammar/lenv_weight.ma".
-include "Basic-2/grammar/cl_shift.ma".
+include "Basic_2/grammar/lenv_weight.ma".
+include "Basic_2/grammar/cl_shift.ma".
 
 (* WEIGHT OF A CLOSURE ******************************************************)
 
@@ -23,14 +23,14 @@ interpretation "weight (closure)" 'Weight L T = (cw L T).
 
 (* Basic properties *********************************************************)
 
-(* Basic-1: was: flt_wf__q_ind *)
+(* Basic_1: was: flt_wf__q_ind *)
 
-(* Basic-1: was: flt_wf_ind *)
+(* Basic_1: was: flt_wf_ind *)
 axiom cw_wf_ind: ∀R:lenv→term→Prop.
                  (∀L2,T2. (∀L1,T1. #[L1,T1] < #[L2,T2] → R L1 T1) → R L2 T2) →
                  ∀L,T. R L T.
 
-(* Basic-1: was: flt_shift *)
+(* Basic_1: was: flt_shift *)
 lemma cw_shift: ∀K,I,V,T. #[K. 𝕓{I} V, T] < #[K, 𝕔{I} V. T].
 normalize //
 qed.
@@ -41,6 +41,6 @@ lemma tw_shift: ∀L,T. #[L, T] ≤ #[L @ T].
 @transitive_le [3: @IHL |2: /2/ | skip ]
 qed.
 
-(* Basic-1: removed theorems 6:
+(* Basic_1: removed theorems 6:
             flt_thead_sx flt_thead_dx flt_arith0 flt_arith1 flt_arith2 flt_trans
 *)